The On-Line Encyclopedia of Bongard Problems

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Objects below match their "symbols" above, according to one "code" versus objects below match their "symbols" above, according to another "code."

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	COMMENTS	`Circle: VV; square: VΛ; triangle: ΛΛ ; blank: ΛV vs. circle: ΛΛ; square: ΛV; triangle: VV; blank: VΛ.`
	CROSSREFS	`Adjacent-numbered pages: BP116 BP117 BP118 BP119 BP120 * BP122 BP123 BP124 BP125 BP126`
	KEYWORD	`arbitrary, consistentsymbols, traditional`
	CONCEPT	`absence_as_presence (info \| search),` `correspondence (info \| search),` `sides_of_line (info \| search),` `triangle (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

Line divides interior into two regions vs. not so.

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	CROSSREFS	`Adjacent-numbered pages: BP117 BP118 BP119 BP120 BP121 * BP123 BP124 BP125 BP126 BP127`
	KEYWORD	`traditional`
	CONCEPT	`separated_regions (info \| search),` `interior_exterior (info \| search),` `number (info \| search),` `tiling (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

Similar shapes vs. dissimilar shapes.

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	CROSSREFS	`Adjacent-numbered pages: BP118 BP119 BP120 BP121 BP122 * BP124 BP125 BP126 BP127 BP128`
	KEYWORD	`noisy, traditional`
	CONCEPT	`similar_shape (info \| search),` `similar (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

Similar textures vs. dissimilar textures.

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	CROSSREFS	`Adjacent-numbered pages: BP119 BP120 BP121 BP122 BP123 * BP125 BP126 BP127 BP128 BP129`
	KEYWORD	`traditional`
	CONCEPT	`same_feature (info \| search),` `same (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

One protrusion and one indentation of the same shape vs. not so.

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	CROSSREFS	`Adjacent-numbered pages: BP120 BP121 BP122 BP123 BP124 * BP126 BP127 BP128 BP129 BP130`
	KEYWORD	`traditional`
	CONCEPT	`indentation (info \| search),` `protrusion (info \| search),` `same_shape (info \| search),` `same (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

One large and one small object vs. not so.

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	CROSSREFS	`Adjacent-numbered pages: BP121 BP122 BP123 BP124 BP125 * BP127 BP128 BP129 BP130 BP131`
	KEYWORD	`traditional`
	CONCEPT	`number (info \| search),` `separation_of_joined_objects (info \| search),` `size (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

Exactly one circle vs. not exactly one circle.

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	CROSSREFS	`Adjacent-numbered pages: BP122 BP123 BP124 BP125 BP126 * BP128 BP129 BP130 BP131 BP132`
	KEYWORD	`noisy, notso, traditional`
	CONCEPT	`exists_one (info \| search),` `number (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

Same objects inside and outside the large shape vs. not same objects inside and outside the large shape.

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	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`

Indentation on protrusion vs. indentation on indentation.

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	CROSSREFS	`Adjacent-numbered pages: BP124 BP125 BP126 BP127 BP128 * BP130 BP131 BP132 BP133 BP134`
	KEYWORD	`traditional`
	CONCEPT	`indentation (info \| search),` `protrusion (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

Closed region is made of curves if flaws are ignored vs. closed region is a polygon if flaws are ignored.

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	CROSSREFS	`Adjacent-numbered pages: BP125 BP126 BP127 BP128 BP129 * BP131 BP132 BP133 BP134 BP135`
	KEYWORD	`noisy, traditional`
	CONCEPT	`curved_straight (info \| search),` `imperfection_small (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

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