The On-Line Encyclopedia of Bongard Problems

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"Stretch-dependent" Bongard Problems vs. Bongard Problems in which examples can be stretched (or compressed) along any axis without being sorted differently.

BP7	BP11	BP12	BP13	BP33	BP50
BP62	BP76	BP77	BP80	BP103	BP152
BP250	BP289	BP328	BP329	BP333	BP335
BP336	BP523	BP525	BP536	BP557	BP559
BP812	BP813	BP816	BP860	BP920	BP924
BP942	BP949	BP1011	BP1086	BP1145	. . .

BP1	BP5	BP15	BP31	BP45	BP98
BP157	BP240	BP322	BP327	BP330	BP331
BP332	BP348	BP363	BP367	BP368	BP369
BP389	BP809	BP810	BP851	BP853	BP911
BP966	BP977	BP992	BP1022	BP1094	BP1131
BP1135	BP1136

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	COMMENTS	`Left-sorted Bongard Problems have the keyword "stretch" on the OEBP.` `If applying a scaling along one particular axis to the whole of any example can change its sorting the BP fits on the left side here. (For BPs with bounding boxes this means scaling and cropping, but without cutting out any detail.)`
	CROSSREFS	`Adjacent-numbered pages: BP1107 BP1108 BP1109 BP1110 BP1111 * BP1113 BP1114 BP1115 BP1116 BP1117`
	KEYWORD	`meta (see left/right), links, keyword, invariance`
	WORLD	`[smaller \| same \| bigger]`
	AUTHOR	`Leo Crabbe`

BP1111

Bongard Problem requires solver to already be interpreting all examples in a specific way for the answer to seem simple vs. not so.

BP200	BP361	BP362	BP793	BP795	BP796
BP802	BP803	BP827	BP828	BP829	BP831
BP832	BP833	BP834	BP835	BP836	BP852
BP871	BP872	BP873	BP874	BP875	BP876
BP877	BP878	BP879	BP880	BP881	BP894
BP955	BP957	BP968	BP987	BP1024	. . .

BP1

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	COMMENTS	`Left-sorted Bongard Problems have the keyword "assumesfamiliarity" on the OEBP.` `Sometimes all the examples in a Bongard Problem need to be interpreted a certain way for the Bongard Problem to make sense. Only once the representation is understood, the idea seems simple.` `For example, all meta Bongard Problems (Bongard Problems sorting other Bongard Problems) assume the solver interprets the examples as Bongard Problems.` `TO DO: Maybe it is best to stop putting the label "assumesfamiliarity" on all meta-Bongard Problems. There are so many of them. It may be better to only use the "assumesfamiliarity" keyword on meta-BPs for a further assumption than just that all examples are interpreted as Bongard Problems. - Aaron David Fairbanks, Feb 11 2021`
	CROSSREFS	`Many Bongard Problems in which all examples take the same format (keyword structure) assume the solver already knows how to read that format.` `Some Bongard Problems assume the solver will be able to understand symbolism that is consistent between examples (keyword consistentsymbols).` `Bongard Problems tagged math often assume the solver is familiar with a certain representation of a math idea.` `Adjacent-numbered pages: BP1106 BP1107 BP1108 BP1109 BP1110 * BP1112 BP1113 BP1114 BP1115 BP1116`
	EXAMPLE	`BP1032: The solution should really read "Assuming all images are Bongard Problems sorting each natural number left or right ..." This Bongard Problem makes sense to someone who has been solving a series of similar BPs, but otherwise there is no reason to automatically read a collection of numbers as standing for a larger collection of numbers.`
	KEYWORD	`fuzzy, meta (see left/right), links, keyword`
	WORLD	`bp [smaller \| same \| bigger]`
	AUTHOR	`Aaron David Fairbanks`

BP1106

Bongard Problem with solution relating to concept: turning black regions white & white regions black vs. Bongard Problem unrelated to this concept.

BP556

BP948

BP1093

BP1107

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	CROSSREFS	`Adjacent-numbered pages: BP1101 BP1102 BP1103 BP1104 BP1105 * BP1107 BP1108 BP1109 BP1110 BP1111`
	KEYWORD	`meta (see left/right), links, metaconcept`
	CONCEPT	`This MBP is about BPs that feature concept: "black_white_inversion"`
	WORLD	`bp [smaller \| same \| bigger]`
	AUTHOR	`Aaron David Fairbanks`

BP1103

Bongard Problem with solution relating to concept: cube vs. Bongard Problem unrelated to this concept.

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	CROSSREFS	`Adjacent-numbered pages: BP1098 BP1099 BP1100 BP1101 BP1102 * BP1104 BP1105 BP1106 BP1107 BP1108`
	KEYWORD	`meta (see left/right), links, metaconcept`
	CONCEPT	`This MBP is about BPs that feature concept: "cube"`
	WORLD	`bp [smaller \| same \| bigger]`
	AUTHOR	`Leo Crabbe`

BP1084

Images of Bongard Problems about images of Bongard Problems vs. images of Bongard Problems not including images of Bongard Problems.

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	CROSSREFS	`See BP537 for the version with links to pages on the OEBP instead of images of Bongard Problems.` `Adjacent-numbered pages: BP1079 BP1080 BP1081 BP1082 BP1083 * BP1085 BP1086 BP1087 BP1088 BP1089`
	KEYWORD	`meta (see left/right), miniproblems, perfect, infinitedetail, presentationinvariant`
	WORLD	`boxes_bpimage [smaller \| same \| bigger] zoom in left`
	AUTHOR	`Leo Crabbe`

BP1083

Image of Bongard Problem where each left example corresponds intuitively to a right example vs. image of Bongard Problem whose examples do not share this correlation.

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	CROSSREFS	`See BP919 for the version with links to pages on the OEBP instead of images of Bongard Problems.` `Adjacent-numbered pages: BP1078 BP1079 BP1080 BP1081 BP1082 * BP1084 BP1085 BP1086 BP1087 BP1088`
	KEYWORD	`teach, meta (see left/right), miniproblems, presentationinvariant`
	WORLD	`boxes_bpimage [smaller \| same \| bigger]`
	AUTHOR	`Leo Crabbe`

BP1081

Left is an open subset of the rational numbers vs. not so.

	BP1047^↔	BP1048^↔	BP1050^↔	BP1053^↔	BP1044	BP1045
	BP1046	BP1052

	BP1044^↔	BP1045^↔	BP1046^↔	BP1051^↔	BP1052^↔	BP1054^↔
	BP1047	BP1048	BP1050	BP1051	BP1053	BP1054

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	CROSSREFS	`Adjacent-numbered pages: BP1076 BP1077 BP1078 BP1079 BP1080 * BP1082 BP1083 BP1084 BP1085 BP1086`
	KEYWORD	`meta (see left/right), links, side, wellfounded`
	CONCEPT	`semidecidable (info \| search),` `finite_infinite (info \| search)`
	WORLD	`outline_or_fill_circle_bp_clear_set_of_ratios [smaller \| same \| bigger]`
	AUTHOR	`Aaron David Fairbanks`

BP1079

A left example can be verified to fit left by checking only finitely many layers deep vs. not so.

BP1058^↔	BP1060^↔	BP1061^↔	BP1062^↔	BP1063^↔	BP1065^↔
BP1068^↔	BP1077^↔	BP1058	BP1059	BP1061	BP1066
BP1070

BP1059^↔	BP1066^↔	BP1067^↔	BP1069^↔	BP1070^↔	BP1071^↔
BP1060	BP1062	BP1063	BP1065	BP1067	BP1068
BP1069	BP1071	BP1077

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	CROSSREFS	`Adjacent-numbered pages: BP1074 BP1075 BP1076 BP1077 BP1078 * BP1080 BP1081 BP1082 BP1083 BP1084`
	KEYWORD	`meta (see left/right), links, side, wellfounded`
	CONCEPT	`semidecidable (info \| search),` `finite_infinite (info \| search)`
	WORLD	`recursive_boxes_bp [smaller \| same \| bigger]`
	AUTHOR	`Aaron David Fairbanks`

BP1078

Bongard Problem with solution relating to concept: semidecidable vs. Bongard Problem unrelated to this concept.

BP1079

BP1081

BP1124

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	CROSSREFS	`Adjacent-numbered pages: BP1073 BP1074 BP1075 BP1076 BP1077 * BP1079 BP1080 BP1081 BP1082 BP1083`
	KEYWORD	`meta (see left/right), links, metaconcept`
	CONCEPT	`This MBP is about BPs that feature concept: "semidecidable"`
	WORLD	`bp [smaller \| same \| bigger]`
	AUTHOR	`Aaron David Fairbanks`

BP1076

Meta Bongard Problems sorting BP1 left vs. meta Bongard Problems sorting BP1 right.

BP501	BP503	BP508	BP509	BP513	BP515
BP541	BP542	BP544	BP546	BP567	BP573
BP627	BP634	BP798	BP883	BP913	BP947
BP1075

	BP504	BP507	BP510	BP522	BP537	BP902
	BP963	BP1113

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	CROSSREFS	`Adjacent-numbered pages: BP1071 BP1072 BP1073 BP1074 BP1075 * BP1077 BP1078 BP1079 BP1080 BP1081`
	KEYWORD	`meta (see left/right), links, metameta, testexample`
	WORLD	`linksbp [smaller \| same \| bigger]`
	AUTHOR	`Aaron David Fairbanks`

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