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BP128 Same objects inside and outside the large shape vs. not same objects inside and outside the large shape.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP123 BP124 BP125 BP126 BP127  *  BP129 BP130 BP131 BP132 BP133

KEYWORD

noisy, traditional

CONCEPT inside (info | search),
interior_exterior (info | search),
outlined_filled (info | search),
shape_cluster (info | search),
cluster (info | search),
same_number (info | search),
same (info | search),
texture (info | search)

AUTHOR

Douglas R. Hofstadter

BP198 Stays in vs. escapes.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP193 BP194 BP195 BP196 BP197  *  BP199 BP200 BP201 BP202 BP203

KEYWORD

nice

CONCEPT line_or_curve_endpoint (info | search),
inside (info | search),
tracing_line_or_curve (info | search)

AUTHOR

Harry E. Foundalis

BP106 Negative slope vs. positive slope.
(edit; present; nest [left/right]; search; history)
COMMENTS

All examples feature a white circle and a black circle. The answer refers to the slope of the line connecting the two circles.

The coloring of the circles is irrelevant.

CROSSREFS

Adjacent-numbered pages:
BP101 BP102 BP103 BP104 BP105  *  BP107 BP108 BP109 BP110 BP111

KEYWORD

nice, noisy, dual, handed, rotate, orderedpair, traditional

CONCEPT positive_negative_slope (info | search),
line_slope (info | search),
imagined_line_or_curve (info | search),
imagined_entity (info | search)

AUTHOR

Douglas R. Hofstadter

BP44 Small circles on different arcs vs. small circles on one arc.
(edit; present; nest [left/right]; search; history)
REFERENCE

M. M. Bongard, Pattern Recognition, Spartan Books, 1970, p. 228.

CROSSREFS

Adjacent-numbered pages:
BP39 BP40 BP41 BP42 BP43  *  BP45 BP46 BP47 BP48 BP49

KEYWORD

finished, traditional, bongard

CONCEPT between (info | search),
cusp (info | search),
on_line_or_curve (info | search),
separation_of_joined_objects (info | search)

AUTHOR

Mikhail M. Bongard

BP79 A dark circle is closer to the outline circle than to the triangle vs. a dark circle is closer to the triangle than to the outline circle.
(edit; present; nest [left/right]; search; history)
REFERENCE

M. M. Bongard, Pattern Recognition, Spartan Books, 1970, p. 240.

CROSSREFS

Adjacent-numbered pages:
BP74 BP75 BP76 BP77 BP78  *  BP80 BP81 BP82 BP83 BP84

KEYWORD

spectrum, finished, traditional, continuous, viceversa, bongard

CONCEPT length_line_or_curve (info | search),
near_far (info | search),
outlined_filled (info | search),
texture (info | search),
triangle (info | search)

AUTHOR

Mikhail M. Bongard

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

BP251 Tetrahedron projected on the box plane vs. not so.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP246 BP247 BP248 BP249 BP250  *  BP252 BP253 BP254 BP255 BP256

KEYWORD

traditional

CONCEPT 3d_solid (info | search)

AUTHOR

Andreas Gunnarsson

BP212 No dot is too far apart from another dot vs. at least one dot is far apart from all other dots.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP207 BP208 BP209 BP210 BP211  *  BP213 BP214 BP215 BP216 BP217

KEYWORD

traditional

CONCEPT collinear (info | search),
near_far (info | search),
curve_texture (info | search),
texture (info | search)

AUTHOR

Giuseppe Insana

BP250 Tetrahedron projected on the box plane vs. not so.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP245 BP246 BP247 BP248 BP249  *  BP251 BP252 BP253 BP254 BP255

KEYWORD

stretch, traditional, left-couldbe

CONCEPT number (info | search),
3d_solid (info | search),
imagined_point (info | search),
imagined_line_or_curve (info | search),
imagined_entity (info | search)

AUTHOR

Andreas Gunnarsson

BP24 A circle vs. no circle.
(edit; present; nest [left/right]; search; history)
COMMENTS

All small squares appearing in this problem are axis-aligned.

REFERENCE

M. M. Bongard, Pattern Recognition, Spartan Books, 1970, p. 221.

CROSSREFS

Adjacent-numbered pages:
BP19 BP20 BP21 BP22 BP23  *  BP25 BP26 BP27 BP28 BP29

KEYWORD

finished, traditional, bongard

CONCEPT circle (info | search),
existence (info | search)

WORLD

circle_square_eq-tri_small_outlines [smaller | same | bigger]

AUTHOR

Mikhail M. Bongard

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