The On-Line Encyclopedia of Bongard Problems

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Impossible solid in 3-D vs. possible solid in 3-D.

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	CROSSREFS	`Adjacent-numbered pages: BP247 BP248 BP249 BP250 BP251 * BP253 BP254 BP255 BP256 BP257`
	KEYWORD	`anticomputer, traditional`
	CONCEPT	`impossible (info \| search),` `3d_impossible_solid (info \| search)`
	AUTHOR	`Andreas Gunnarsson`

Impossible Bongard Problems vs. possible Bongard Problems.

BP821

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	COMMENTS	`"Impossible Bongard Problem" is a loose term, but it roughly means the Bongard Problem can't be displayed as an image.` `BP868, the version of this whose examples are images of Bongard Problems (miniproblems), rather than links to pages on the OEBP, is impossible. - Aaron David Fairbanks, Jul 29 2020`
	CROSSREFS	`See overriddensolution for Problem solutions that Bongard Problems can have, but that will not be chosen by a reasonable person as the best solution.` `Adjacent-numbered pages: BP816 BP817 BP818 BP819 BP820 * BP822 BP823 BP824 BP825 BP826`
	KEYWORD	`meta (see left/right), links, keyword, right-self`
	CONCEPT	`impossible (info \| search)`
	WORLD	`bp [smaller \| same \| bigger]`
	AUTHOR	`Leo Crabbe`

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

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	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	`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`

Impossible to realize in 3D space vs. not so.

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	COMMENTS	`Each unit is to be imagined as a flat rigid rod/hoop/triangle/etc.`
	REFERENCE	`https://en.wikipedia.org/wiki/Borromean_rings`
	CROSSREFS	`Similar to BP252.` `Adjacent-numbered pages: BP1128 BP1129 BP1130 BP1131 BP1132 * BP1134 BP1135 BP1136 BP1137 BP1138`
	KEYWORD	`precise, stretch`
	CONCEPT	`impossible (info \| search)`
	AUTHOR	`Leo Crabbe`

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