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BP839 Opposite (inverse) transformations have been applied to the same specific small square on opposite sides of the dividing line versus not so.
(edit; present; nest [left/right]; search; history)
COMMENTS

The original pre-transformed square is the same across all examples, however it is not shown in most examples; what the pre-transformed square looks like must be deduced by the solver.

CROSSREFS

BP1260 is about applying the same transformation to different objects.

Adjacent-numbered pages:
BP834 BP835 BP836 BP837 BP838  *  BP840 BP841 BP842 BP843 BP844

KEYWORD

easy, abstract, arbitrary, anticomputer, traditional, rules

CONCEPT square (info | search),
specificity (info | search),
function (info | search)

AUTHOR

Aaron David Fairbanks

BP838 Visual Bongard Problems that through many examples build up consistent interpretations of objects (a language of symbolism) vs. other visual Bongard Problems.
BP121
?
BP393
?
BP847
(edit; present; nest [left/right]; search; history)
COMMENTS

Left-sorted Bongard Problems have the keyword "consistentsymbols" on the OEBP.


A most extreme "consistentsymbols" Bongard Problem is BP121: the solution is about codes consistently symbolizing objects. However, "consistentsymbols" Bongard Problems may have solution unrelated to the symbolism; the symbolism may just be implicit, e.g. always meaning dots as numbers, always meaning stacked dots as fractions, repeatedly using the same simple drawings as shorthand to represent platonic solids. Most BPs have some symbolism in this sense; a Bongard Problem should only be labelled "consistentsymbols" if there is a relatively high amount of varied symbolism, particularly if it is visual symbolism not all people would naturally understand.


A Bongard Problem featuring a real language would be another extreme example of "consistentsymbols".


A Bongard Problem with many varied images meant to be interpreted in unique ways is not necessarily "consistentsymbols," since there is no specific-to-this-Bongard-Problem vocabulary of symbols that must be known to understand it. (Even so, some might say that how people intuitively interpret images is a vocabulary on its own.)


Sometimes, the symbolism isn't an important part of the Bongard Problem, and it just helps make the Bongard Problem easier to read (see the help keyword). For example, a Bongard Problem may include many clumps of dots, and the solution of the Problem may have to do with counting the number of dots in each clump; the Bongard Problem might build up a symbolic context by always arranging each number of dots in a consistent way (e.g. how they conventionally appear on dice faces).

CROSSREFS

"Consistentsymbols" is related to the keyword structure, a format that all examples fit that the solver needs to know how to read. In "consistentsymbols" Bongard Problems, not all examples need to fit a rigid format; instead there may be various smaller structures of meaning that only appear in some examples.


"Consistentsymbols" is related to assumesfamiliarity, BPs that require the solver to take certain assumptions about what the examples are for the solution to seem simple. A "consistentsymbols" Bongard Problem may have a very convoluted solution that involves explaining the meaning of each appearing object; however, the solution can become simple given correct interpretations of all objects. This effect works best when each object must be interpreted the same way across all boxes in order for the simple solution to fit. The comments sections of "consistentsymbols" BP pages on the OEBP ought to explain the symbolism used.

Adjacent-numbered pages:
BP833 BP834 BP835 BP836 BP837  *  BP839 BP840 BP841 BP842 BP843

KEYWORD

meta (see left/right), links, keyword, wellfounded

WORLD

visualbp [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP837 Bongard Problems in which individual examples may be unclearly sorted (it may be arguable which side they should go on) but many examples together are still able to communicate the solution vs. other Bongard Problems.
BP331
BP359
BP360
BP393
BP801
BP813
BP847
(edit; present; nest [left/right]; search; history)
COMMENTS

Left examples have the keyword "collective" on the OEBP.


Some Bongard Problems are "collective" in a more extreme way than others. Perhaps there are absolutely no individual examples that anyone would confidently sort on either side, and the solver can only be expected to get a vague gist by seeing them all together. Or perhaps in practice most people agree about where most examples should fit, even though a stretch of an argument could conceivably be made for each one fitting on the other side.


In some collective Bongard Problems, each example admits a number of possible interpretations, and the correct choice of interpretation is only clear once the solution is known. The group of examples together improve the solver's confidence about having understood each individual one right. This is common in rules Bongard Problems), where each example communicates its own rule.


Collective Bongard Problems are borderline invalid Bongard Problems (see https://www.oebp.org/invalid.php ). There is no one rule dividing the sides; the solution is not a method to determine whether an arbitrary example fits left or right. It is a less strict kind of Bongard Problem.

CROSSREFS

Collective implies fuzzy.

Collective Bongard Problems are often abstract".

Subjective Bongard Problems are often collective.


In some Bongard Problems, each example has a corresponding slightly different twin example on the other side (keyword contributepairs), and it is necessary to see both examples together in order to be able to sort either of them. This is related to "collective" but not quite the same. It becomes unambiguous where an example fits once its twin is seen.

Adjacent-numbered pages:
BP832 BP833 BP834 BP835 BP836  *  BP838 BP839 BP840 BP841 BP842

KEYWORD

meta (see left/right), links, keyword

WORLD

bp [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP836 Image of a Bongard Problem with solution about a geometrical symmetry (invariance under spatial transformation) vs. not so.
(edit; present; nest [left/right]; search; history)
COMMENTS

Every Bongard Problem on the left shows invariance under some transformation in left sub-examples.


Some Bongard Problems on the right are symmetrical or have sub-examples that are symmetrical.

CROSSREFS

See BP760 for the version with links to pages on the OEBP instead of images of Bongard Problems.

Adjacent-numbered pages:
BP831 BP832 BP833 BP834 BP835  *  BP837 BP838 BP839 BP840 BP841

KEYWORD

meta (see left/right), miniproblems, creativeexamples, assumesfamiliarity, structure, presentationinvariant

CONCEPT symmetry (info | search)

WORLD

boxes_bpimage_three_per_side [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP835 Image of a Bongard Problem with solution about tiling vs. not so.
(edit; present; nest [left/right]; search; history)
COMMENTS

"Tiling" is placing shapes next to each other without overlap to fill up space or other shapes.

CROSSREFS

See BP706 for the version with links to pages on the OEBP instead of images of Bongard Problems.

Adjacent-numbered pages:
BP830 BP831 BP832 BP833 BP834  *  BP836 BP837 BP838 BP839 BP840

KEYWORD

meta (see left/right), miniproblems, creativeexamples, assumesfamiliarity, structure, presentationinvariant

CONCEPT tiling (info | search)

WORLD

boxes_bpimage_three_per_side [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP834 Image of a Bongard Problem such that the bottom left box rules out a solution vs. no single box affects the solution.
(edit; present; nest [left/right]; search; history)
COMMENTS

When removal of a box changes the solution, it cannot remove the existing solution; it can only allow more possible new solutions. Conversely, adding boxes can only narrow down between existing solutions.


The special box is always placed in the bottom left for help, but another solution is "there is some box whose removal allows another solution vs. not".


Bongard Problems sorted left might be called "deceptive". Especially when the solution ruled out by the one box is the more obvious solution.

CROSSREFS

Adjacent-numbered pages:
BP829 BP830 BP831 BP832 BP833  *  BP835 BP836 BP837 BP838 BP839

KEYWORD

meta (see left/right), miniproblems, creativeexamples, presentationmatters, assumesfamiliarity, structure

WORLD

boxes_bpimage_three_per_side [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP833 Image of a Bongard Problem with (left) solution property that can have multiplicity vs. not so.
(edit; present; nest [left/right]; search; history)
COMMENTS

All examples are "object present vs. object absent" Problems.

CROSSREFS

Adjacent-numbered pages:
BP828 BP829 BP830 BP831 BP832  *  BP834 BP835 BP836 BP837 BP838

KEYWORD

abstract, meta (see left/right), miniproblems, creativeexamples, assumesfamiliarity, structure, presentationinvariant

CONCEPT existence (info | search),
number (info | search),
one (info | search)

WORLD

[smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP832 Image of a Bongard Problem with solution presence of a specific object vs. image of a Bongard Problem with solution presence of a type of object.
(edit; present; nest [left/right]; search; history)
COMMENTS

"Specific object" we mean the same connected figure (up to movement around the box). It is ambiguous whether a scaled, rotated, or reflected version of an object would be considered "the same object" because no examples on either side are forced to deal with that subtlety in their respective solutions.

CROSSREFS

Adjacent-numbered pages:
BP827 BP828 BP829 BP830 BP831  *  BP833 BP834 BP835 BP836 BP837

KEYWORD

meta (see left/right), miniproblems, assumesfamiliarity, structure, presentationinvariant

CONCEPT existence (info | search)

WORLD

[smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP831 Image of a Bongard Problem with left side having two rules and right side narrowing it down vs. image of Bongard Problem whose right hand side adds no information.
(edit; present; nest [left/right]; search; history)
COMMENTS

Right examples are Bongard Problems in which the left hand side is enough to communicate the full answer.


No examples shown have right side with multiple rules and left side narrowing down the answer.

CROSSREFS

Adjacent-numbered pages:
BP826 BP827 BP828 BP829 BP830  *  BP832 BP833 BP834 BP835 BP836

KEYWORD

hard, meta (see left/right), miniproblems, creativeexamples, presentationmatters, assumesfamiliarity, structure, contributepairs

WORLD

boxes_bpimage_three_per_side [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP830 Image of a Bongard Problem with left side a "positive" property and right side the "negative" property versus vice versa.
(edit; present; nest [left/right]; search; history)
COMMENTS

Left: the left hand side is enough to communicate the answer; the left pattern can be seen without the counterexamples on the right.

Right: the right hand side is enough to communicate the answer; the right pattern can be seen without counterexamples on the left.


Flipping a BP will switch its sorting.


The following is taken from the comments on page BP513 (keyword left-narrow):

Call a pattern "narrow" if it is likely to be noticed in a collection of examples, without any counterexamples provided.

A collection of triangles will be recognized as such; "triangles" is a narrow pattern. A collection of non-triangular shapes will just be seen as "shapes"; "not triangles" is not narrow.

Narrow patterns tend to be phrased positively ("is [property]"), while non-narrow patterns opposite narrow patterns tend to be phrased negatively ("is not [property]").

CROSSREFS

See keywords left-narrow and right-narrow.

Adjacent-numbered pages:
BP825 BP826 BP827 BP828 BP829  *  BP831 BP832 BP833 BP834 BP835

KEYWORD

dual, handed, leftright, meta (see left/right), miniproblems, contributepairs, viceversa, presentationinvariant

WORLD

boxes_bpimage_three_per_side [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

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