The On-Line Encyclopedia of Bongard Problems

Bongard Problem with solution relating to concept: protrusion vs. Bongard Problem unrelated to this concept.

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	CROSSREFS	`Adjacent-numbered pages: BP675 BP676 BP677 BP678 BP679 * BP681 BP682 BP683 BP684 BP685`
	KEYWORD	`meta (see left/right), links, metaconcept, primitive`
	CONCEPT	`This MBP is about BPs that feature concept: "protrusion"`
	WORLD	`bp [smaller \| same \| bigger]`
	AUTHOR	`Harry E. Foundalis`

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