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BP342 Exactly one axis of symmetry vs. either zero or more than one axis of symmetry.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP337 BP338 BP339 BP340 BP341  *  BP343 BP344 BP345 BP346 BP347

KEYWORD

traditional, finishedexamples

CONCEPT exists_one (info | search),
imagined_line_or_curve (info | search),
imagined_entity (info | search),
symmetry_axis (info | search),
symmetry (info | search)

WORLD

shape_outline [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP343 No two shapes are the same vs. at least two shapes are the same.
(edit; present; nest [left/right]; search; history)
CROSSREFS

BP57 is the same solution except all examples have two shapes.

Adjacent-numbered pages:
BP338 BP339 BP340 BP341 BP342  *  BP344 BP345 BP346 BP347 BP348

KEYWORD

traditional

CONCEPT existence (info | search),
identical (info | search),
same_shape (info | search),
same (info | search),
two (info | search)

WORLD

shapes [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP344 Shape can tile itself vs. shape cannot tile itself.
(edit; present; nest [left/right]; search; history)
COMMENTS

Left examples are sometimes called "rep-tiles."


The tiles all must be the same size. More specifically, all left examples can tile themselves only using scaled down and rotated versions of themselves with all tiles the same size. Right examples cannot tile themselves using scaled down rotated versions of themselves or even reflected versions of themselves with all tiles the same size.


Without the puzzle piece-like shape EX4120 on the right side the current examples also allow the solution "shape can tile with itself so as to create a parallelogram vs. shape cannot tile with itself so as to create a parallelogram."

CROSSREFS

See BP532 for a version with fractals.

Adjacent-numbered pages:
BP339 BP340 BP341 BP342 BP343  *  BP345 BP346 BP347 BP348 BP349

EXAMPLE

Go to https://oebp.org/files/yet.png for an illustration of how some left-sorted shapes tile themselves.

KEYWORD

hard, nice, precise, notso, unstable, math, hardsort, creativeexamples, proofsrequired, perfect, traditional

CONCEPT recursion (info | search),
self-reference (info | search),
tiling (info | search),
imagined_shape (info | search),
imagined_entity (info | search)

WORLD

shape [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP345 Intersection of circle and square vs. union of circle and square.
(edit; present; nest [left/right]; search; history)
COMMENTS

An image of only a circle or of only a square would be ambiguously categorized.

CROSSREFS

Adjacent-numbered pages:
BP340 BP341 BP342 BP343 BP344  *  BP346 BP347 BP348 BP349 BP350

KEYWORD

nice, left-narrow, right-narrow, traditional, both

CONCEPT set_intersection (info | search),
set_union (info | search),
imagined_shape (info | search),
imagined_entity (info | search),
overlap (info | search)

WORLD

[smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP346 Object on the right fits in pattern on the left vs. object on the right does not fit in pattern on the left.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP341 BP342 BP343 BP344 BP345  *  BP347 BP348 BP349 BP350 BP351

KEYWORD

nice, creativeexamples, structure, traditional, rules

CONCEPT categorization (info | search)

AUTHOR

Aaron David Fairbanks

BP347 No pattern (variety of shapes) vs. all shapes have something in common.
(edit; present; nest [left/right]; search; history)
CROSSREFS

See BP378 for a similar idea using just two objects per example.

Adjacent-numbered pages:
BP342 BP343 BP344 BP345 BP346  *  BP348 BP349 BP350 BP351 BP352

KEYWORD

nice, left-unknowable, right-narrow, traditional

CONCEPT existence (info | search),
shape_cluster (info | search),
cluster_of_one (info | search),
cluster (info | search)

WORLD

several_small_misc [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP348 Shape on the right is the convex hull of shape on the left vs. not so.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP343 BP344 BP345 BP346 BP347  *  BP349 BP350 BP351 BP352 BP353

KEYWORD

nice, precise, unstable, perfect, orderedpair, traditional

CONCEPT convex_hull (info | search)

WORLD

2_fill_shapes [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP349 One object does not belong to the pattern of the rest vs. all objects form one pattern.
(edit; present; nest [left/right]; search; history)
COMMENTS

The left examples are the right examples with one object altered, which makes the solution easier to see.


"Odd one out."

CROSSREFS

Adjacent-numbered pages:
BP344 BP345 BP346 BP347 BP348  *  BP350 BP351 BP352 BP353 BP354

KEYWORD

anticomputer, help, contributepairs, traditional, rules

CONCEPT categorization (info | search),
existence (info | search),
feature_cluster (info | search),
number_cluster (info | search),
shape_cluster (info | search),
cluster_of_one (info | search),
cluster (info | search),
one (info | search)

AUTHOR

Aaron David Fairbanks

BP350 Some quantity keeps increasing from left to right vs. not so.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP345 BP346 BP347 BP348 BP349  *  BP351 BP352 BP353 BP354 BP355

KEYWORD

creativeexamples, structure, traditional, rules

CONCEPT size_increase_decrease (info | search),
iteration (info | search),
tracing_line_or_curve (info | search)

WORLD

quantity_vary_seq_noise_allowed [smaller | same | bigger]
zoom in left (quantity_change_seq_increase_right_noise_allowed)

AUTHOR

Aaron David Fairbanks

BP351 Discrete quantity vs. continuous quantity.
(edit; present; nest [left/right]; search; history)
CROSSREFS

See BP873 for the version with Bongard Problems.

Adjacent-numbered pages:
BP346 BP347 BP348 BP349 BP350  *  BP352 BP353 BP354 BP355 BP356

KEYWORD

creativeexamples, structure, traditional, rules

CONCEPT size_increase_decrease (info | search),
discrete_continuous (info | search),
iteration (info | search),
tracing_line_or_curve (info | search)

WORLD

constant_change_seq_increase_right [smaller | same | bigger]
zoom in left (constant_change_discrete_seq_increase_right)

AUTHOR

Aaron David Fairbanks

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