Search: all
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BP919 |
| BP Pages on the OEBP where users are advised to upload left examples and right examples in pairs vs. other BP Pages. |
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COMMENTS
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Left examples have the keyword "contributepairs" on the OEBP.
When this keyword is added to a Problem, OEBP users are advised to add a corresponding right example for every left example they add and vice versa.
It is common for Bongard Problems to present left examples on the left side and corresponding altered versions of those examples on the right side, tweaked only slightly, to highlight the difference and make the solution easier to see (see keyword help).
This is common in more abstract Bongard Problems that admit a wide range of examples, a variety of different styles or types (e.g. BP360). Showing two versions of the same thing, one on the left and one on the right, helps a person interpret what that thing is meant to be in the context of the Bongard Problem; whatever qualities vary between the two in the pair must be relevant.
If a person cannot sort an example according to the solution property without seeing its corresponding opposite example, the Bongard Problem is invalid (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. See also Bongard Problems with the keyword collective, which are similarly borderline-invalid.
A BP in which each left example corresponds to a right example and vice versa could be remade as a Bongard Problem in which the left examples are the pairs. For example BP360 would turn into "a pair consisting of the ordered version of something and the chaotic version of the same thing vs. a pair of things not satisfying this relationship." This process would turn a Bongard Problem that is invalid in the sense described above into a valid one.
(See keyword orderedpair.)
In some "contributepairs" Bongard Problems there really is a natural choice of left version for every right example and vice versa (see keyword dual); in others the choice is artificially imposed by the Bongard Problem creator.
When "contributepairs" Bongard Problems are laid out in the format with a grid of boxes on either side of a dividing line, the boxes may be arranged so as to highlight the correspondence: either
A B | A B
E F | E F
G H | G H
or
A B | B A
E F | F E
G H | H G. |
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CROSSREFS
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Adjacent-numbered pages:
BP914 BP915 BP916 BP917 BP918  *  BP920 BP921 BP922 BP923 BP924
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KEYWORD
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meta (see left/right), links, keyword, oebp, right-self, instruction
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WORLD
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bppage [smaller | same | bigger] zoom in left (correspondence_bp)
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AUTHOR
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Aaron David Fairbanks
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COMMENTS
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A spot-the-difference exercise.
Arguably invalid (solution not simple). |
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CROSSREFS
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Adjacent-numbered pages:
BP915 BP916 BP917 BP918 BP919  *  BP921 BP922 BP923 BP924 BP925
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KEYWORD
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less, precise, convoluted, arbitrary, stretch, unstable, left-finite, left-full, perfect, pixelperfect, experimental, funny
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CONCEPT
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imperfection_small (info | search), specificity (info | search)
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WORLD
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bmp [smaller | same | bigger]
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AUTHOR
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Aaron David Fairbanks
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BP921 |
| Bongard Problem with solution relating to concept: gravity vs. Bongard Problem unrelated to this concept. |
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BP922 |
| One row is rearranged to make the other by swapping an odd number of object pairs vs. one row is rearranged to make the other by swapping an even number of object pairs. |
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BP923 |
| Bongard Problem with solution relating to concept: permutation vs. Bongard Problem unrelated to this concept. |
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BP924 |
| Polygons where all sides are different lengths vs. Polygons where not all sides are different lengths. |
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COMMENTS
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All examples in this Problem are outlines of convex polygons.
This is a generalisation of scalene triangles to any polygon. |
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CROSSREFS
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The left side implies the right side of BP329 (regular vs. irregular polygons), but the converse is not true.
The left side of BP329 implies the right side, but the converse is not true.
Adjacent-numbered pages:
BP919 BP920 BP921 BP922 BP923  *  BP925 BP926 BP927 BP928 BP929
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EXAMPLE
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Any scalene triangle will fit on the left, because no two sides are equal.
However, any regular polygon will not fit on the left, because all of its sides are equal.
A random convex polygon will "almost surely" fit on the left. |
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KEYWORD
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nice, stretch, right-narrow, traditional
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CONCEPT
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all (info | search)
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WORLD
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polygon_outline [smaller | same | bigger]
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AUTHOR
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Jago Collins
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BP925 |
| The numbers of dots differ by three vs. not so. |
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BP926 |
| Numbers of dots in ascending order from left to right vs. numbers of dots neither in ascending nor descending order from left to right. |
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