The On-Line Encyclopedia of Bongard Problems

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The shapes in the large square never appear outside of it vs. at least one shape in the large square appears outside of it.

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	CROSSREFS	`Adjacent-numbered pages: BP286 BP287 BP288 BP289 BP290 * BP292 BP293 BP294 BP295 BP296`
	KEYWORD	`traditional`
	CONCEPT	`inside (info \| search),` `interior_exterior (info \| search)`
	AUTHOR	`"Lewis"`

Angle made by shapes with vertex at square is not acute vs. angle made by shapes with vertex at square is acute.

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	CROSSREFS	`Adjacent-numbered pages: BP287 BP288 BP289 BP290 BP291 * BP293 BP294 BP295 BP296 BP297`
	KEYWORD	`precise, spectrum, traditional, preciseworld`
	CONCEPT	`acute (info \| search),` `imagined_line_or_curve (info \| search),` `imagined_entity (info \| search)`
	AUTHOR	`"Lewis"`

Square divided into four areas of the same size and shape vs. not so.

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	CROSSREFS	`Adjacent-numbered pages: BP288 BP289 BP290 BP291 BP292 * BP294 BP295 BP296 BP297 BP298`
	KEYWORD	`nice, traditional`
	CONCEPT	`square (info \| search),` `same_shape (info \| search),` `same (info \| search)`
	AUTHOR	`"Lewis"`

The two points are reachable through a path vs. the two points are unreachable by any path.

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	CROSSREFS	`Adjacent-numbered pages: BP289 BP290 BP291 BP292 BP293 * BP295 BP296 BP297 BP298 BP299`
	KEYWORD	`traditional`
	CONCEPT	`maze (info \| search),` `path (info \| search),` `reachable (info \| search)`
	AUTHOR	`"Lewis"`

Line joins large and small square vs. line joins the two middle-sized squares.

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	CROSSREFS	`Adjacent-numbered pages: BP290 BP291 BP292 BP293 BP294 * BP296 BP297 BP298 BP299 BP300`
	KEYWORD	`traditional`
	CONCEPT	`correspondence (info \| search),` `size (info \| search)`
	AUTHOR	`"Lewis"`

All three sizes are present vs. only two of the three sizes present.

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	CROSSREFS	`Adjacent-numbered pages: BP291 BP292 BP293 BP294 BP295 * BP297 BP298 BP299 BP300 BP301`
	KEYWORD	`traditional`
	CONCEPT	`all (info \| search),` `existence (info \| search),` `number (info \| search)`
	AUTHOR	`"Lewis"`

Ghost shape is square vs. Ghost shape is rectangular.

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	CROSSREFS	`Adjacent-numbered pages: BP292 BP293 BP294 BP295 BP296 * BP298 BP299 BP300 BP301 BP302`
	KEYWORD	`traditional`
	CONCEPT	`absence_as_presence (info \| search),` `ghost (info \| search)`
	AUTHOR	`"Lewis"`

One of the two small squares is near the lower-right corner vs. one of the two small squares is near the upper-right corner.

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	CROSSREFS	`Adjacent-numbered pages: BP293 BP294 BP295 BP296 BP297 * BP299 BP300 BP301 BP302 BP303`
	KEYWORD	`noisy, traditional`
	CONCEPT	`absolute_position (info \| search),` `existence (info \| search)`
	AUTHOR	`"Lewis"`

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"`

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`

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