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Search: ex:BP91
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BP886 Bongard Problems relating to concept: three vs. other Bongard Problems.
BP6
BP10
BP39
BP40
BP85
BP86
BP88
BP89
BP90
BP91
BP141
BP142
BP144
BP147
BP156
BP166
BP167
BP255
BP302
BP308
BP531
BP806
BP925
BP949
BP1019
BP1047
BP1049
BP1053
BP1063
BP1138
BP1226
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP881 BP882 BP883 BP884 BP885  *  BP887 BP888 BP889 BP890 BP891

KEYWORD

meta (see left/right), links, metaconcept

CONCEPT This MBP is about BPs that feature concept: "three"
Searchable synonyms: "3".

WORLD

bp [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP887 Bongard Problems relating to concept: four vs. other Bongard Problems.
BP6
BP10
BP40
BP87
BP90
BP91
BP145
BP302
BP1210
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP882 BP883 BP884 BP885 BP886  *  BP888 BP889 BP890 BP891 BP892

KEYWORD

meta (see left/right), links, metaconcept

CONCEPT This MBP is about BPs that feature concept: "four"
Searchable synonyms: "4".

WORLD

bp [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP913 Bongard Problems in which fine subtleties of images may be considered with respect to the solution (no slightly wrong hand-drawings) vs. other visual Bongard Problems.
BP1
BP160
BP199
BP210
BP211
BP213
BP216
BP217
BP223
BP312
BP321
BP324
BP325
BP335
BP341
BP344
BP348
BP367
BP368
BP386
BP523
BP529
BP530
BP531
BP532
BP533
BP551
BP557
BP559
BP564
BP816
BP852
BP859
BP860
BP861

. . .

BP5
BP6
BP72
BP91
BP136
BP148
?
BP119
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COMMENTS

Left examples have the keyword "perfect" on the OEBP.

Right examples have the keyword "ignoreimperfections".


Consider the difference in style between BP344 and BP24.


Hand-drawn figures in BPs are typically imperfect. A "circles vs. squares" BP may only show what are approximately circles and approximately squares. A pedant might append to the solutions of all Bongard Problems the caveat "...when figures are interpreted as the most obvious shapes they approximate."

This is the meaning of the label "ignoreimperfections". On the other hand, the label "perfect" means even the pedant would drop this caveat; either all the images are precise, or precision doesn't matter (see also keyword stable).


Even in BPs tagged "perfect", the tiny rough edges caused by image pixelation are not expected to matter. If the OEBP would indeed prefer users only upload pixel-perfect examples, a BP can be tagged with the stricter keyword pixelperfect.

E.g., for BPs having to do with smooth curves and lines, "perfect" only requires images offer the best possible approximation of those intended shapes given the resolution.


Most Bongard Problems involving small details at all would be tagged "perfect". However, this is not always so; sometimes the small details are intended to be noticed, but certain imperfections are still intended to be overlooked.


BP119 ("small correction results in circle vs. not") is an interesting example: imperfections matter with respect to the outline being closed, but imperfections do not matter with respect to circular-ness.


If a Bongard Problem on the OEBP is tagged "ignoreimperfections" -- i.e., it has imperfect hand drawings -- then other keywords are generally applied relative to the intended idea, a corrected version sans imperfect hand drawings. (For example, this is how the keywords precise and stable are applied. Alternative versions of these keywords, which factor in imperfect hand drawings, could be made instead, but that would be less useful.)




It may be better to change the definition of "perfect" so it only applies to Bongard Problems such that small changes can potentially switch an example's side / remove it from the Bongard Problem. That would cut down on the number of Bongard Problems to label "perfect". There isn't currently a single keyword for "small changes can potentially switch an example's side / remove it from the Bongard Problem", but this is basically captured by unstable or unstableworld. There is also deformunstable which uses a different notion of "small change". - Aaron David Fairbanks, Jun 16 2023

CROSSREFS

See BP508 for discussion of this topic in relation to Bongard Problems tagged precise.


Stable Bongard Problems are generally "perfect".

Pixelperfect implies "perfect".


The keywords proofsrequired and noproofs (BP1125) have a similar relationship: "noproofs" indicates a lenience for a certain kind of imperfection.

Adjacent-numbered pages:
BP908 BP909 BP910 BP911 BP912  *  BP914 BP915 BP916 BP917 BP918

EXAMPLE

Many Bongard Problems involving properties of curves (e.g. BP62) really are about those wiggly, imperfect curves; they qualify as "perfect" problems. On the other hand, Bongard Problems involving polygons, (e.g. BP5) often show only approximately-straight lines; they are not "perfect" problems.

KEYWORD

meta (see left/right), links, keyword, wellfounded

WORLD

visualbp [smaller | same | bigger]
zoom in left (perfect_bp)

AUTHOR

Aaron David Fairbanks

BP940 Bongard Problems such that there is a way of making an infinite list of all relevant possible right-sorted examples vs. Bongard Problems where there is no such way of listing all right-sorted examples.
BP386
BP394
BP904
BP926
BP931
BP956
BP997
BP1057
BP1072
BP1146
BP1147
BP1148
BP1149
BP1150
BP1199
BP1200
BP1201
BP91
BP329
BP351
BP538
BP559
BP593
BP801
BP902
BP920
(edit; present; nest [left/right]; search; history)
COMMENTS

Left-sorted Problems have the keyword "right-listable" on the OEBP.


BPs are sorted based on how BP563 (left-listable) would sort them were they flipped; see that page for a description.

CROSSREFS

See right-finite, which distinguishes between finite right side and infinite right side.

Adjacent-numbered pages:
BP935 BP936 BP937 BP938 BP939  *  BP941 BP942 BP943 BP944 BP945

KEYWORD

meta (see left/right), links, keyword

WORLD

bp_infinite_right_examples [smaller | same | bigger]
zoom in right (right_uncountable_bp)

AUTHOR

Leo Crabbe

BP1113 Bongard Problems relating to the OEBP vs. Bongard Problems unrelated to the OEBP.
BP503
BP504
BP518
BP542
BP546
BP919
BP930
BP943
BP967
BP1113
BP1121
BP1125
BP1150
BP1174
BP1
BP2
BP3
BP4
BP5
BP6
BP7
BP8
BP9
BP10
BP11
BP12
BP13
BP14
BP15
BP16
BP17
BP18
BP19
BP20
BP21
BP22
BP23
BP24
BP25
BP26
BP27
BP28
BP29
BP30
BP31
BP32
BP33
BP34
BP35

. . .

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

Bongard Problems sorted left have the keyword "oebp" on the OEBP.


Most Bongard Problems relating to the OEBP are meta.

CROSSREFS

Adjacent-numbered pages:
BP1108 BP1109 BP1110 BP1111 BP1112  *  BP1114 BP1115 BP1116 BP1117 BP1118

KEYWORD

notso, meta (see left/right), links, keyword, oebp, left-self, metameta

AUTHOR

Leo Crabbe

BP1194 Bongard Problems listed in Harry E. Foundalis's collection vs. not.
BP1
BP2
BP3
BP4
BP5
BP6
BP7
BP8
BP9
BP10
BP11
BP12
BP13
BP14
BP15
BP16
BP17
BP18
BP19
BP20
BP21
BP22
BP23
BP24
BP25
BP26
BP27
BP28
BP29
BP30
BP31
BP32
BP33
BP34
BP35

. . .

BP501
BP503
BP504
BP505
BP506
BP507
BP508
BP509
BP510
BP1194
(edit; present; nest [left/right]; search; history)
COMMENTS

Alternatively, BP pages on the OEBP with number less than or equal to 394 vs. other BP pages.

REFERENCE

https://www.foundalis.com/res/bps/bpidx.htm

CROSSREFS

Adjacent-numbered pages:
BP1189 BP1190 BP1191 BP1192 BP1193  *  BP1195 BP1196 BP1197 BP1198 BP1199

EXAMPLE

Foundalis's collection includes all Bongard Problems by Bongard.

KEYWORD

meta (see left/right), links, right-self, time

AUTHOR

Aaron David Fairbanks

BP1196 Bongard Problems with content touching the border of some examples vs. Bongard Problems with a lip of whitespace around the border of all examples.
BP157
BP210
BP211
BP321
BP806
BP966
BP971
BP972
BP1008
BP1014
BP1089
BP1093
BP1228
BP1230
BP1245
BP1249
BP1252
BP1
BP2
BP3
BP4
BP5
BP6
BP7
BP8
BP9
BP10
BP11
BP12
BP13
BP14
BP15
BP16
BP17
BP18
BP19
BP20
BP21
BP22
BP23
BP24
BP25
BP26
BP27
BP28
BP29
BP30
BP31
BP32
BP33
BP34
BP35

. . .

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

Bongard Problems sorted left have the keyword "bordercontent" on the OEBP.


All of Bongard's original Problems have whitespace around the border of all examples.

CROSSREFS

Adjacent-numbered pages:
BP1191 BP1192 BP1193 BP1194 BP1195  *  BP1197 BP1198 BP1199 BP1200 BP1201

KEYWORD

meta (see left/right), links, keyword

AUTHOR

Aaron David Fairbanks

BP1198 Bongard Problems with images featuring dithering to simulate shades of gray vs. no gray.
BP193
BP195
BP196
BP225
BP331
BP373
BP393
BP394
BP812
BP813
BP847
BP850
BP1110
BP1175
BP1184
BP1191
BP1197
BP1224
BP1
BP2
BP3
BP4
BP5
BP6
BP7
BP8
BP9
BP10
BP11
BP12
BP13
BP14
BP15
BP16
BP17
BP18
BP19
BP20
BP21
BP22
BP23
BP24
BP25
BP26
BP27
BP28
BP29
BP30
BP31
BP32
BP33
BP34
BP35

. . .

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

Bongard Problems sorted left have the keyword "dithering" on the OEBP.

CROSSREFS

Bongard's original Problems never involved shades of gray. They were just black and white drawings.

Adjacent-numbered pages:
BP1193 BP1194 BP1195 BP1196 BP1197  *  BP1199 BP1200 BP1201 BP1202 BP1203

KEYWORD

meta (see left/right), links, keyword

AUTHOR

Aaron David Fairbanks

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