The On-Line Encyclopedia of Bongard Problems

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The tightest-curved section, out of all sections of curve that make a complete turn (360 degrees), contains an x-crossing point vs. not so.

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	COMMENTS	`All examples are connected smooth curves allowed to self-intersect that must curve in only one direction (starting at one end, either clockwise or counter-clockwise), i.e. there is no inflection point.`
	CROSSREFS	`Adjacent-numbered pages: BP208 BP209 BP210 BP211 BP212 * BP214 BP215 BP216 BP217 BP218`
	KEYWORD	`less, convoluted, perfect, traditional`
	CONCEPT	`x-crossing (info \| search)`
	AUTHOR	`Giuseppe Insana`

Smiley face vs. not a smiley face.

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	CROSSREFS	`Adjacent-numbered pages: BP209 BP210 BP211 BP212 BP213 * BP215 BP216 BP217 BP218 BP219`
	KEYWORD	`less, culture`
	CONCEPT	`specific_style (info \| search),` `specificity (info \| search)`
	AUTHOR	`Giuseppe Insana`

No small square at the end of any curve vs. curve ends at a small square.

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	CROSSREFS	`Adjacent-numbered pages: BP216 BP217 BP218 BP219 BP220 * BP222 BP223 BP224 BP225 BP226`
	KEYWORD	`less, traditional`
	CONCEPT	`existence (info \| search),` `curve_texture (info \| search),` `texture (info \| search)`
	AUTHOR	`Giuseppe Insana`

Five concavities vs. not five concavities.

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	CROSSREFS	`Adjacent-numbered pages: BP226 BP227 BP228 BP229 BP230 * BP232 BP233 BP234 BP235 BP236`
	KEYWORD	`less, noisy, arbitrary, traditional`
	CONCEPT	`indentation (info \| search),` `number (info \| search),` `five (info \| search)`
	AUTHOR	`Giuseppe Insana`

Upper central line APPEARS shorter than lower central line vs. upper central line APPEARS longer than lower central line.

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	CROSSREFS	`Adjacent-numbered pages: BP232 BP233 BP234 BP235 BP236 * BP238 BP239 BP240 BP241 BP242`
	KEYWORD	`less, anticomputer, subjective, culture, invalid, traditional`
	CONCEPT	`length_line_or_curve (info \| search),` `visual_illusion (info \| search)`
	AUTHOR	`Peter Shanahan`

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`

Shape outlines that aren't triangles vs. black shapes that aren't squares.

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	COMMENTS	`An example of an overriddensolution.`
	CROSSREFS	`Adjacent-numbered pages: BP565 BP566 BP567 BP568 BP569 * BP571 BP572 BP573 BP574 BP575`
	KEYWORD	`less, example, overriddensolution, experimental, funny, neither`
	WORLD	`outline_or_fill_shape [smaller \| same \| bigger]`
	AUTHOR	`Aaron David Fairbanks`

Number pointed to on number line is "important" mathematical constant vs. not so.

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	COMMENTS	`This is the "harder version" of BP505.`
	CROSSREFS	`Adjacent-numbered pages: BP796 BP797 BP798 BP799 BP800 * BP802 BP803 BP804 BP805 BP806`
	KEYWORD	`hard, less, abstract, math, subjective, challenge, right-unknowable, collective, experimental, finishedexamples`
	AUTHOR	`Aaron David Fairbanks`

Human faces vs. other images.

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	CROSSREFS	`Adjacent-numbered pages: BP857 BP858 BP859 BP860 BP861 * BP863 BP864 BP865 BP866 BP867`
	KEYWORD	`less, teach, anticomputer, culture, experimental`
	WORLD	`black_and_white_photograph [smaller \| same \| bigger] zoom in left (black_and_white_face_photograph)`
	AUTHOR	`Leo Crabbe`

Images of impossible Bongard Problems vs. images of possible Bongard Problems.

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	COMMENTS	`This fits on its own left side.`
	CROSSREFS	`See BP821 for the version with links to pages on the OEBP (instead of images of Bongard Problems), of which this fits on the left side.` `Adjacent-numbered pages: BP863 BP864 BP865 BP866 BP867 * BP869 BP870 BP871 BP872 BP873`
	KEYWORD	`less, notso, meta (see left/right), miniproblems, example, left-finite, left-full, impossible, experimental, funny, presentationinvariant`
	CONCEPT	`impossible (info \| search)`
	WORLD	`bpimage [smaller \| same \| bigger]`
	AUTHOR	`Aaron David Fairbanks`

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