The On-Line Encyclopedia of Bongard Problems

Search: author:Douglas R. Hofstadter

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Polygon stands on side vs. polygon stands on vertex.

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	CROSSREFS	`Adjacent-numbered pages: BP111 BP112 BP113 BP114 BP115 * BP117 BP118 BP119 BP120 BP121`
	KEYWORD	`noisy, traditional`
	CONCEPT	`base (info \| search),` `horizontal (info \| search),` `uppermost_lowermost (info \| search),` `vertex_of_meeting_lines (info \| search),` `vertical (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

Innermost shape is reachable from the outermost one vs. innermost shape is unreachable from the outermost one.

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	CROSSREFS	`Adjacent-numbered pages: BP110 BP111 BP112 BP113 BP114 * BP116 BP117 BP118 BP119 BP120`
	KEYWORD	`traditional`
	CONCEPT	`innermost_outermost (info \| search),` `path (info \| search),` `reachable (info \| search),` `tracing_line_or_curve (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

Four X-like points vs. two X-like points.

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	CROSSREFS	`Adjacent-numbered pages: BP109 BP110 BP111 BP112 BP113 * BP115 BP116 BP117 BP118 BP119`
	KEYWORD	`traditional`
	CONCEPT	`x-crossing (info \| search),` `number (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

T-like junction vs. y-like junction.

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	CROSSREFS	`Adjacent-numbered pages: BP108 BP109 BP110 BP111 BP112 * BP114 BP115 BP116 BP117 BP118`
	KEYWORD	`traditional`
	CONCEPT	`branch_point (info \| search),` `t-point (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

X-coordinates of dots are equidistant vs. y-coordinates of dots are equidistant.

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	CROSSREFS	`Adjacent-numbered pages: BP107 BP108 BP109 BP110 BP111 * BP113 BP114 BP115 BP116 BP117`
	KEYWORD	`hard, nice, antihuman, traditional`
	CONCEPT	`coordinate (info \| search),` `length_line_or_curve (info \| search),` `midpoint (info \| search),` `imagined_line_or_curve (info \| search),` `imagined_entity (info \| search),` `same_feature (info \| search),` `same (info \| search)`
	WORLD	`three_points [smaller \| same \| bigger]`
	AUTHOR	`Douglas R. Hofstadter`

Middle shape is a triangle vs. middle shape is not a triangle.

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	CROSSREFS	`Adjacent-numbered pages: BP106 BP107 BP108 BP109 BP110 * BP112 BP113 BP114 BP115 BP116`
	KEYWORD	`traditional`
	CONCEPT	`between (info \| search),` `inside (info \| search),` `triangle (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

Four out of five objects are circles vs. never four out of five objects are circles.

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	CROSSREFS	`Adjacent-numbered pages: BP105 BP106 BP107 BP108 BP109 * BP111 BP112 BP113 BP114 BP115`
	KEYWORD	`number, traditional`
	CONCEPT	`number (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

Circle on the right of the box vs. circle on the left of the box.

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	CROSSREFS	`Adjacent-numbered pages: BP104 BP105 BP106 BP107 BP108 * BP110 BP111 BP112 BP113 BP114`
	KEYWORD	`noisy, dual, handed, leftright, traditional`
	CONCEPT	`absolute_position (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

Petals taper off vs. petals thicken.

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	CROSSREFS	`Adjacent-numbered pages: BP103 BP104 BP105 BP106 BP107 * BP109 BP110 BP111 BP112 BP113`
	KEYWORD	`nice, traditional`
	CONCEPT	`all (info \| search),` `size_increase_decrease (info \| search),` `protrusion (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

Three simple lines vs. three complex lines.

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	CROSSREFS	`Adjacent-numbered pages: BP102 BP103 BP104 BP105 BP106 * BP108 BP109 BP110 BP111 BP112`
	KEYWORD	`number, traditional`
	CONCEPT	`number (info \| search),` `curve_texture (info \| search),` `texture (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

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