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BP36 Triangle above circle vs. circle above triangle.
(edit; present; nest [left/right]; search; history)
REFERENCE

M. M. Bongard, Pattern Recognition, Spartan Books, 1970, p. 225.

CROSSREFS

Adjacent-numbered pages:
BP31 BP32 BP33 BP34 BP35  *  BP37 BP38 BP39 BP40 BP41

KEYWORD

spectrum, dual, handed, updown, rotate, finished, orderedpair, traditional, continuous, viceversa, bongard

CONCEPT above_below (info | search),
triangle (info | search),
quantity_comparison (info | search)

WORLD

one_circle_one_eq-tri_small_outlines [smaller | same | bigger]

AUTHOR

Mikhail M. Bongard

BP199 Stays put vs. tumbles.
(edit; present; nest [left/right]; search; history)
CROSSREFS

BP273 has the same solution, except all examples are letters.

Adjacent-numbered pages:
BP194 BP195 BP196 BP197 BP198  *  BP200 BP201 BP202 BP203 BP204

KEYWORD

nice, handed, updown, rotate, physics, anticomputer, perfect

CONCEPT base (info | search),
downward_upward (info | search),
tumbles_or_stays_put (info | search),
line_absolute_direction (info | search),
absolute_direction (info | search),
imagined_line_or_curve (info | search),
imagined_entity (info | search),
direction (info | search),
gravity (info | search)

AUTHOR

Harry E. Foundalis

BP286 Decreasing in size from top to bottom vs. increasing in size from top to bottom.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP281 BP282 BP283 BP284 BP285  *  BP287 BP288 BP289 BP290 BP291

KEYWORD

dual, handed, updown, traditional

CONCEPT size_increase_decrease (info | search),
downward_upward (info | search),
regular_irregular_change (info | search),
size (info | search)

AUTHOR

"Lewis"

BP313 Closed curves clockwise, open curves counterclockwise vs. closed curves counterclockwise, open curves clockwise.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP308 BP309 BP310 BP311 BP312  *  BP314 BP315 BP316 BP317 BP318

KEYWORD

dual, handed, leftright, updown, traditional

CONCEPT turn_orientation (info | search),
closed_open (info | search)

AUTHOR

Jakub Štepo

BP337 Black is below upward slopes vs. black is below downward slopes.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP332 BP333 BP334 BP335 BP336  *  BP338 BP339 BP340 BP341 BP342

KEYWORD

nice, dual, handed, leftright, updown, blackwhite, traditional

CONCEPT above_below (info | search),
downward_upward (info | search),
outlined_filled (info | search),
texture (info | search)

AUTHOR

Aaron David Fairbanks

BP363 Counterclockwise along the curve following the arrow vs. clockwise along the curve following the arrow.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP358 BP359 BP360 BP361 BP362  *  BP364 BP365 BP366 BP367 BP368

KEYWORD

easy, nice, dual, handed, leftright, updown, gap, traditional

CONCEPT arrow (info | search),
turn_orientation (info | search),
tracing_line_or_curve (info | search)

AUTHOR

Aaron David Fairbanks

BP551 Unstable balance vs. not
(edit; present; nest [left/right]; search; history)
REFERENCE

https://en.wikipedia.org/wiki/Stability_theory

CROSSREFS

Adjacent-numbered pages:
BP546 BP547 BP548 BP549 BP550  *  BP552 BP553 BP554 BP555 BP556

EXAMPLE

The classic example is a pendulum with a solid rod (instead of a string) which has a stable balance point at the bottom of its swing, where if you move the pendulum slightly it will swing back towards that balanced state. However, theoretically the pendulum can also be balanced pointing directly up. In this case, if you move the pendulum slightly it will swing down away from that upwards balanced state.

KEYWORD

updown, rotate, physics, anticomputer, perfect

CONCEPT tumbles_or_stays_put (info | search),
gravity (info | search)

AUTHOR

Jago Collins

BP896 Filled completely by fluid poured into gap (assuming there is already air) vs. not so.
(edit; present; nest [left/right]; search; history)
COMMENTS

For a non-physics-based solution, "there exists a never-vertically-increasing path starting from the opening to each point in the interior vs. not so." - Aaron David Fairbanks, Aug 01 2020

CROSSREFS

Adjacent-numbered pages:
BP891 BP892 BP893 BP894 BP895  *  BP897 BP898 BP899 BP900 BP901

KEYWORD

nice, handed, updown, physics

CONCEPT liquid_flow (info | search),
gravity (info | search)

WORLD

[smaller | same | bigger]

AUTHOR

Zane Fry

BP972 Top half has more black (less white) than bottom half versus vice versa.
(edit; present; nest [left/right]; search; history)
COMMENTS

A similar, but different, solution is "center of mass is above the horizontal vs. center of mass is below the horizontal."

CROSSREFS

See BP971 for the version with examples rotated a quarter-turn.

Adjacent-numbered pages:
BP967 BP968 BP969 BP970 BP971  *  BP973 BP974 BP975 BP976 BP977

KEYWORD

precise, spectrum, dual, handed, updown, boundingbox, blackwhite, traditional, viceversa, absoluteposition, bordercontent

AUTHOR

Aaron David Fairbanks

BP1008 The 26th from the left, 63rd from the top pixel is black versus white.
(edit; present; nest [left/right]; search; history)
COMMENTS

This is a typical kind of joke answer people give for Bongard Problems when they cannot find an answer.

CROSSREFS

Adjacent-numbered pages:
BP1003 BP1004 BP1005 BP1006 BP1007  *  BP1009 BP1010 BP1011 BP1012 BP1013

KEYWORD

less, dual, arbitrary, handed, leftright, updown, boundingbox, blackwhite, antihuman, right-null, perfect, pixelperfect, help, experimental, funny, absoluteposition, bordercontent

CONCEPT specificity (info | search)

AUTHOR

Aaron David Fairbanks

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