The On-Line Encyclopedia of Bongard Problems

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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`

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`

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`

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`

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`

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`

Triangle points to center of circle vs. triangle does not point to center of circle.

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	CROSSREFS	`Adjacent-numbered pages: BP112 BP113 BP114 BP115 BP116 * BP118 BP119 BP120 BP121 BP122`
	KEYWORD	`traditional`
	CONCEPT	`between (info \| search),` `on_line_or_curve (info \| search),` `midpoint (info \| search),` `pointing_to (info \| search),` `center_of_circle (info \| search),` `center (info \| search),` `imagined_point (info \| search),` `imagined_line_or_curve (info \| search),` `imagined_entity (info \| search),` `triangle_arrow (info \| search),` `triangle (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

No cycle vs. a cycle exists.

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	CROSSREFS	`Adjacent-numbered pages: BP113 BP114 BP115 BP116 BP117 * BP119 BP120 BP121 BP122 BP123`
	KEYWORD	`traditional`
	CONCEPT	`arrow (info \| search),` `cyclic_path (info \| search),` `existence (info \| search),` `path (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

A small correction will result in a single circle vs. no small correction will result in a single circle.

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	CROSSREFS	`Adjacent-numbered pages: BP114 BP115 BP116 BP117 BP118 * BP120 BP121 BP122 BP123 BP124`
	KEYWORD	`fuzzy, traditional`
	CONCEPT	`existence (info \| search),` `imperfection_small (info \| search)`
	WORLD	`curves_drawing [smaller \| same \| bigger]`
	AUTHOR	`Douglas R. Hofstadter`

All turns are in one direction and rectangular loop exists vs. turns in different directions and no rectangular loop exists.

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	CROSSREFS	`Adjacent-numbered pages: BP115 BP116 BP117 BP118 BP119 * BP121 BP122 BP123 BP124 BP125`
	KEYWORD	`traditional`
	CONCEPT	`all (info \| search),` `turn_orientation (info \| search),` `tracing_line_or_curve (info \| search),` `turning_direction (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

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