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BP237 Upper central line APPEARS shorter than lower central line vs. upper central line APPEARS longer than lower central line.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP232 BP233 BP234 BP235 BP236  *  BP238 BP239 BP240 BP241 BP242

KEYWORD

less, anticomputer, subjective, culture, invalid, traditional

CONCEPT length_line_or_curve (info | search),
visual_illusion (info | search)

AUTHOR

Peter Shanahan

BP301 Large and medium-sized square, the latter can be hidden vs. large and small-sized square, the latter can be hidden.
?
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP296 BP297 BP298 BP299 BP300  *  BP302 BP303 BP304 BP305 BP306

KEYWORD

invalid, traditional

CONCEPT outlined_filled (info | search),
size (info | search),
objects_overlap (info | search),
overlap (info | search),
texture (info | search)

AUTHOR

"Lewis"

BP538 Shown is a box of this Bongard Problem (BP538) vs. not so.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP533 BP534 BP535 BP536 BP537  *  BP539 BP540 BP541 BP542 BP543

KEYWORD

less, notso, left-finite, finished, invalid, experimental, funny

CONCEPT recursion (info | search),
self-reference (info | search)

AUTHOR

Aaron David Fairbanks

BP545 Solution for this problem (BP545) in English text vs. not.
(edit; present; nest [left/right]; search; history)
COMMENTS

This Problem admits multiple solutions besides "Solution for this problem in English text vs. not so," some of which are listed as the left examples. Some do not depend on the English language, so this Problem is technically "solvable" without the relevant cultural information.

CROSSREFS

Adjacent-numbered pages:
BP540 BP541 BP542 BP543 BP544  *  BP546 BP547 BP548 BP549 BP550

KEYWORD

less, notso, culture, finished, invalid, experimental, funny

CONCEPT recursion (info | search),
self-reference (info | search)

AUTHOR

Aaron David Fairbanks

BP812 Aesthetically pleasing vs. not so.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP807 BP808 BP809 BP810 BP811  *  BP813 BP814 BP815 BP816 BP817

KEYWORD

easy, abstract, notso, stretch, anticomputer, subjective, invalid, experimental, funny, dithering

AUTHOR

Aaron David Fairbanks

BP882 Vaguely positive vs. vaguely negative
(edit; present; nest [left/right]; search; history)
COMMENTS

Requires cultural knowledge, e.g. for specific warning symbols

CROSSREFS

Adjacent-numbered pages:
BP877 BP878 BP879 BP880 BP881  *  BP883 BP884 BP885 BP886 BP887

KEYWORD

easy, less, abstract, spectrum, anticomputer, subjective, culture, invalid

AUTHOR

Thomas Joyce

BP902 This Bongard Problem vs. anything else.
BP902
BP1

becious

(edit; present; nest [left/right]; search; history)
COMMENTS

Although this Bongard Problem is self-referential, it's only because of the specific phrasing of the solution. "BP902 vs. anything else" would also work. The number 902 could have been chosen coincidentally.

CROSSREFS

See BP953, BP959.

Adjacent-numbered pages:
BP897 BP898 BP899 BP900 BP901  *  BP903 BP904 BP905 BP906 BP907

KEYWORD

notso, meta (see left/right), links, left-self, left-narrow, left-finite, left-full, right-null, right-it, invalid, experimental, funny

CONCEPT self-reference (info | search),
specificity (info | search)

WORLD

everything [smaller | same]
zoom in left (bp902)

AUTHOR

Leo Crabbe

BP939 Optical illusions vs. not so.
(edit; present; nest [left/right]; search; history)
COMMENTS

Panels on the left hand side contain geometrical objects that appear distorted (to a human) due to surrounding information.

REFERENCE

Vicente Sierra-Vázquez & Ignacio Serrano-Pedraza, Application of Riesz transforms to the isotropic AM-PM decomposition of geometrical-optical illusion images, April 2010, Figure 1.

CROSSREFS

Adjacent-numbered pages:
BP934 BP935 BP936 BP937 BP938  *  BP940 BP941 BP942 BP943 BP944

KEYWORD

fuzzy, anticomputer, subjective, contributepairs, invalid, experimental

CONCEPT length_line_or_curve (info | search),
visual_illusion (info | search)

AUTHOR

Leo Crabbe

BP941 JPEG image vs. PNG image.
(edit; present; nest [left/right]; search; history)
COMMENTS

Evidently this solution is stretching the idea of what makes images "different". Each corresponding pair of panels would be parsed as identical in any other case. It is worth noting that if you view this Problem on a template, the solution no longer applies at all.

CROSSREFS

Adjacent-numbered pages:
BP936 BP937 BP938 BP939 BP940  *  BP942 BP943 BP944 BP945 BP946

KEYWORD

less, precise, dual, antihuman, contributepairs, invalid, experimental, funny

AUTHOR

Leo Crabbe

BP942 Square bounding box vs. oblong rectangular bounding box.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP937 BP938 BP939 BP940 BP941  *  BP943 BP944 BP945 BP946 BP947

KEYWORD

precise, stretch, boundingbox, invalid, experimental, preciseworld

CONCEPT bounding_box (info | search),
square (info | search)

WORLD

rectangular_arrangement_of_white_pixels [smaller | same | bigger]
zoom in left (square_arrangement_of_white_pixels) | zoom in right (oblong_rectangular_arrangement_of_white_pixels)

AUTHOR

Leo Crabbe

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