The On-Line Encyclopedia of Bongard Problems

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Center of symmetry vs. no center of symmetry.

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	CROSSREFS	`Adjacent-numbered pages: BP264 BP265 BP266 BP267 BP268 * BP270 BP271 BP272 BP273 BP274`
	CONCEPT	`symmetry (info \| search)`
	WORLD	`arial_font_centered_connected_symbol [smaller \| same \| bigger]`
	AUTHOR	`Merse E. Gáspár`

Convex hull elongated vertically vs. convex hull elongated horizontally.

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	CROSSREFS	`Adjacent-numbered pages: BP263 BP264 BP265 BP266 BP267 * BP269 BP270 BP271 BP272 BP273`
	CONCEPT	`convex_hull (info \| search),` `elongated_compact (info \| search),` `horizontal (info \| search),` `vertical (info \| search)`
	WORLD	`arial_font_symbols [smaller \| same \| bigger]`
	AUTHOR	`Merse E. Gáspár`

Odd number of straight line segments vs. even number of straight line segments.

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	CROSSREFS	`Adjacent-numbered pages: BP262 BP263 BP264 BP265 BP266 * BP268 BP269 BP270 BP271 BP272`
	CONCEPT	`even_odd (info \| search)`
	WORLD	`arial_font_centered_connected_symbol [smaller \| same \| bigger]`
	AUTHOR	`Merse E. Gáspár`

At least one touch or cross point vs. no touch or cross point.

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	CROSSREFS	`Adjacent-numbered pages: BP261 BP262 BP263 BP264 BP265 * BP267 BP268 BP269 BP270 BP271`
	CONCEPT	`x-crossing (info \| search),` `or (info \| search),` `existence (info \| search),` `t-point (info \| search)`
	WORLD	`arial_font_centered_symbol [smaller \| same \| bigger]`
	AUTHOR	`Merse E. Gáspár`

Axis of symmetry vs. no axis of symmetry.

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	CROSSREFS	`Adjacent-numbered pages: BP260 BP261 BP262 BP263 BP264 * BP266 BP267 BP268 BP269 BP270`
	CONCEPT	`symmetry_axis (info \| search),` `symmetry (info \| search)`
	WORLD	`arial_font_centered_connected_symbol [smaller \| same \| bigger]`
	AUTHOR	`Merse E. Gáspár`

Closed area vs. no closed area.

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	CROSSREFS	`Adjacent-numbered pages: BP259 BP260 BP261 BP262 BP263 * BP265 BP266 BP267 BP268 BP269`
	CONCEPT	`closed_open (info \| search),` `hole (info \| search)`
	WORLD	`arial_font_centered_symbol [smaller \| same \| bigger]`
	AUTHOR	`Merse E. Gáspár`

At least one ending edge is straight vs. all ending edges are curved.

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	CROSSREFS	`Adjacent-numbered pages: BP258 BP259 BP260 BP261 BP262 * BP264 BP265 BP266 BP267 BP268`
	KEYWORD	`traditional`
	CONCEPT	`curved_straight (info \| search),` `slope_at_endpoint (info \| search)`
	AUTHOR	`Pablo Barenbaum`

Exactly one point where lines bend at an angle vs. not exactly one point where lines bend at an angle.

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	CROSSREFS	`Adjacent-numbered pages: BP257 BP258 BP259 BP260 BP261 * BP263 BP264 BP265 BP266 BP267`
	KEYWORD	`less, convoluted, traditional`
	CONCEPT	`angle (info \| search),` `number (info \| search)`
	AUTHOR	`Pablo Barenbaum`

Straight lines that join filled and outlined circles intersect vs. straight lines that join filled and outlined circles do not intersect.

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	CROSSREFS	`Adjacent-numbered pages: BP256 BP257 BP258 BP259 BP260 * BP262 BP263 BP264 BP265 BP266`
	KEYWORD	`noisy, traditional`
	CONCEPT	`lines_coincide (info \| search),` `x-crossing (info \| search),` `outlined_filled (info \| search),` `feature_cluster (info \| search),` `cluster (info \| search),` `imagined_line_or_curve (info \| search),` `imagined_entity (info \| search),` `texture (info \| search)`
	AUTHOR	`Michael Ihde`

Squares are either all empty or all contain something vs. not so.

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	CROSSREFS	`Adjacent-numbered pages: BP255 BP256 BP257 BP258 BP259 * BP261 BP262 BP263 BP264 BP265`
	KEYWORD	`traditional`
	CONCEPT	`all (info \| search),` `or (info \| search),` `empty (info \| search)`
	AUTHOR	`Carla Rispoli`

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