The On-Line Encyclopedia of Bongard Problems

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Is polygon vs. is smooth without straight lines or corners.

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	COMMENTS	`All examples in this Bongard Problem are outlines of shapes.`
	REFERENCE	`M. M. Bongard, Pattern Recognition, Spartan Books, 1970, p. 215.`
	CROSSREFS	`Adjacent-numbered pages: BP1 BP2 BP3 BP4 * BP6 BP7 BP8 BP9 BP10`
	KEYWORD	`easy, nice, ignoreimperfections, finished, traditional, bongard`
	CONCEPT	`curved_straight (info \| search)`
	WORLD	`shape_outline [smaller \| same \| bigger] zoom in left (polygon_outline)`
	AUTHOR	`Mikhail M. Bongard`

Closed region is made of curves if flaws are ignored vs. closed region is a polygon if flaws are ignored.

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	CROSSREFS	`Adjacent-numbered pages: BP125 BP126 BP127 BP128 BP129 * BP131 BP132 BP133 BP134 BP135`
	KEYWORD	`noisy, traditional`
	CONCEPT	`curved_straight (info \| search),` `imperfection_small (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

Wedged endings vs. rounded endings.

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	CROSSREFS	`Adjacent-numbered pages: BP149 BP150 BP151 BP152 BP153 * BP155 BP156 BP157 BP158 BP159`
	KEYWORD	`traditional`
	CONCEPT	`curved_straight (info \| search),` `line_or_curve_endpoint (info \| search),` `imagined_line_or_curve (info \| search),` `imagined_entity (info \| search),` `specific_style (info \| search),` `specificity (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

Curves are longer than straight lines vs. curves are shorter than straight lines.

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	CROSSREFS	`Adjacent-numbered pages: BP150 BP151 BP152 BP153 BP154 * BP156 BP157 BP158 BP159 BP160`
	KEYWORD	`traditional`
	CONCEPT	`curved_straight (info \| search),` `length_line_or_curve (info \| search),` `specific_style (info \| search),` `specificity (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

Equal numbers of straight lines and continuous curves vs. unequal numbers of straight lines and continuous curves.

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	CROSSREFS	`Adjacent-numbered pages: BP241 BP242 BP243 BP244 BP245 * BP247 BP248 BP249 BP250 BP251`
	KEYWORD	`traditional`
	CONCEPT	`curved_straight (info \| search),` `number (info \| search)`
	AUTHOR	`Carla Rispoli`

Five straight or curved lines vs. not five straight or curved lines.

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	CROSSREFS	`Adjacent-numbered pages: BP242 BP243 BP244 BP245 BP246 * BP248 BP249 BP250 BP251 BP252`
	KEYWORD	`traditional`
	CONCEPT	`curved_straight (info \| search),` `number (info \| search)`
	AUTHOR	`Andreas Gunnarsson`

At least one ending edge is straight vs. all ending edges are curved.

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	CROSSREFS	`Adjacent-numbered pages: BP258 BP259 BP260 BP261 BP262 * BP264 BP265 BP266 BP267 BP268`
	KEYWORD	`traditional`
	CONCEPT	`curved_straight (info \| search),` `slope_at_endpoint (info \| search)`
	AUTHOR	`Pablo Barenbaum`

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