The On-Line Encyclopedia of Bongard Problems

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Three or more small clusters of dots vs. not so.

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	CROSSREFS	`BP307 is similar.` `Adjacent-numbered pages: BP303 BP304 BP305 BP306 BP307 * BP309 BP310 BP311 BP312 BP313`
	KEYWORD	`traditional`
	CONCEPT	`feature_cluster (info \| search),` `cluster (info \| search),` `three (info \| search)`
	AUTHOR	`"Lewis"`

Dots are in tight clusters around convex vertices vs. dots are spread around.

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	CROSSREFS	`BP308 is similar.` `Adjacent-numbered pages: BP302 BP303 BP304 BP305 BP306 * BP308 BP309 BP310 BP311 BP312`
	KEYWORD	`traditional`
	CONCEPT	`vertex_of_meeting_lines (info \| search),` `feature_cluster (info \| search),` `cluster (info \| search)`
	AUTHOR	`"Lewis"`

Ratio of inside to outside identical shapes is constant vs. not so.

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	CROSSREFS	`Adjacent-numbered pages: BP301 BP302 BP303 BP304 BP305 * BP307 BP308 BP309 BP310 BP311`
	KEYWORD	`traditional`
	CONCEPT	`inside (info \| search),` `interior_exterior (info \| search),` `ratio (info \| search)`
	AUTHOR	`"Lewis"`

Shapes identical after rotation vs. shapes identical after rotation and mirroring.

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	CROSSREFS	`Adjacent-numbered pages: BP300 BP301 BP302 BP303 BP304 * BP306 BP307 BP308 BP309 BP310`
	KEYWORD	`nice, unorderedpair, traditional`
	CONCEPT	`rotation_required (info \| search),` `same_shape (info \| search),` `same (info \| search)`
	AUTHOR	`"Lewis"`

At least one (interior or exterior) right angle vs. no right angle (either interior or exterior).

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	CROSSREFS	`Adjacent-numbered pages: BP299 BP300 BP301 BP302 BP303 * BP305 BP306 BP307 BP308 BP309`
	KEYWORD	`traditional, finishedexamples`
	WORLD	`polygon_outline [smaller \| same \| bigger]`
	AUTHOR	`"Lewis"`

Three objects are identical, the fourth differs vs. not so.

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	CROSSREFS	`Adjacent-numbered pages: BP298 BP299 BP300 BP301 BP302 * BP304 BP305 BP306 BP307 BP308`
	KEYWORD	`noisy, traditional, fixedgrid`
	CONCEPT	`same_shape (info \| search),` `same (info \| search)`
	AUTHOR	`"Lewis"`

5 collinear objects, of which the 3rd is moved elsewhere vs. 5 collinear objects, of which the 2nd/4th is moved elsewhere.

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	CROSSREFS	`Adjacent-numbered pages: BP297 BP298 BP299 BP300 BP301 * BP303 BP304 BP305 BP306 BP307`
	KEYWORD	`traditional`
	CONCEPT	`collinear (info \| search),` `ordinal_orering (info \| search),` `two (info \| search),` `three (info \| search),` `four (info \| search),` `five (info \| search)`
	AUTHOR	`"Lewis"`

Large and medium-sized square, the latter can be hidden vs. large and small-sized square, the latter can be hidden.

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	CROSSREFS	`Adjacent-numbered pages: BP296 BP297 BP298 BP299 BP300 * BP302 BP303 BP304 BP305 BP306`
	KEYWORD	`invalid, traditional`
	CONCEPT	`outlined_filled (info \| search),` `size (info \| search),` `objects_overlap (info \| search),` `overlap (info \| search),` `texture (info \| search)`
	AUTHOR	`"Lewis"`

Acceleration and deceleration vs. constant speed.

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	CROSSREFS	`Adjacent-numbered pages: BP295 BP296 BP297 BP298 BP299 * BP301 BP302 BP303 BP304 BP305`
	KEYWORD	`animated, experimental`
	CONCEPT	`acceleration (info \| search),` `size_increase_decrease (info \| search),` `speed (info \| search),` `real_motion (info \| search),` `motion (info \| search)`
	AUTHOR	`Harry E. Foundalis`

Lines if slightly extended make up a regular polygon vs. lines if slightly extended cannot make up a regular polygon.

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	CROSSREFS	`Adjacent-numbered pages: BP294 BP295 BP296 BP297 BP298 * BP300 BP301 BP302 BP303 BP304`
	KEYWORD	`traditional`
	CONCEPT	`imperfection_small (info \| search)`
	WORLD	`segments [smaller \| same \| bigger]`
	AUTHOR	`"Lewis"`

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