The On-Line Encyclopedia of Bongard Problems

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Non-wiggly outline vs. wiggly outline.

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	COMMENTS	`"Wiggly" means a high number of small concavities adjacent to one another all around the outline.` `All examples in this Bongard Problem are shape outlines.` `Shapes with outlines that are only wiggly within partial sections would be ambiguous. Shapes with outlines that have many medium-size concavities would be ambiguous.`
	REFERENCE	`M. M. Bongard, Pattern Recognition, Spartan Books, 1970, p. 216.`
	CROSSREFS	`Adjacent-numbered pages: BP4 BP5 BP6 BP7 BP8 * BP10 BP11 BP12 BP13 BP14`
	KEYWORD	`easy, nice, fuzzy, stable, world, finished, traditional, bongard`
	CONCEPT	`curve_texture (info \| search),` `texture (info \| search)`
	WORLD	`Multiple options: mediumsize_centered_outline [smaller \| same \| bigger], shape_outline [smaller \| same \| bigger]`
	AUTHOR	`Mikhail M. Bongard`

Shading thicker on the right side vs. shading thicker on the left side.

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	REFERENCE	`M. M. Bongard, Pattern Recognition, Spartan Books, 1970, p. 234.`
	CROSSREFS	`Adjacent-numbered pages: BP58 BP59 BP60 BP61 BP62 * BP64 BP65 BP66 BP67 BP68`
	KEYWORD	`dual, handed, finished, traditional, viceversa, bongard`
	CONCEPT	`left_right (info \| search),` `curve_texture (info \| search),` `texture (info \| search)`
	AUTHOR	`Mikhail M. Bongard`

Three simple lines vs. three complex lines.

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	CROSSREFS	`Adjacent-numbered pages: BP102 BP103 BP104 BP105 BP106 * BP108 BP109 BP110 BP111 BP112`
	KEYWORD	`number, traditional`
	CONCEPT	`number (info \| search),` `curve_texture (info \| search),` `texture (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

Curve is smooth close to the middle vs. curve zigzags close to the middle.

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	CROSSREFS	`Adjacent-numbered pages: BP179 BP180 BP181 BP182 BP183 * BP185 BP186 BP187 BP188 BP189`
	KEYWORD	`traditional`
	CONCEPT	`imagined_point (info \| search),` `imagined_entity (info \| search),` `curve_texture (info \| search),` `texture (info \| search)`
	WORLD	`curve [smaller \| same \| bigger]`
	AUTHOR	`Harry E. Foundalis`

Curve with two complex parts vs. curve with three complex parts.

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	CROSSREFS	`Adjacent-numbered pages: BP180 BP181 BP182 BP183 BP184 * BP186 BP187 BP188 BP189 BP190`
	KEYWORD	`traditional`
	CONCEPT	`number (info \| search),` `curve_texture (info \| search),` `texture (info \| search)`
	WORLD	`curve [smaller \| same \| bigger]`
	AUTHOR	`Harry E. Foundalis`

No dot is too far apart from another dot vs. at least one dot is far apart from all other dots.

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	CROSSREFS	`Adjacent-numbered pages: BP207 BP208 BP209 BP210 BP211 * BP213 BP214 BP215 BP216 BP217`
	KEYWORD	`traditional`
	CONCEPT	`collinear (info \| search),` `near_far (info \| search),` `curve_texture (info \| search),` `texture (info \| search)`
	AUTHOR	`Giuseppe Insana`

Ink tip (non-homogeneous line) vs. Marker tip (homogeneous line).

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	CROSSREFS	`Adjacent-numbered pages: BP211 BP212 BP213 BP214 BP215 * BP217 BP218 BP219 BP220 BP221`
	KEYWORD	`perfect`
	CONCEPT	`line_or_curve_endpoint (info \| search),` `curve_texture (info \| search),` `texture (info \| search)`
	AUTHOR	`Giuseppe Insana`

Totally black lines vs. lines with white specks.

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	CROSSREFS	`Adjacent-numbered pages: BP212 BP213 BP214 BP215 BP216 * BP218 BP219 BP220 BP221 BP222`
	KEYWORD	`perfect, pixelperfect`
	CONCEPT	`curve_texture (info \| search),` `texture (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`

Dashed lines inside solid shape make an identical but slightly smaller shape, parallel to the one outside vs. not so.

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	CROSSREFS	`Adjacent-numbered pages: BP243 BP244 BP245 BP246 BP247 * BP249 BP250 BP251 BP252 BP253`
	KEYWORD	`traditional`
	CONCEPT	`inside (info \| search),` `size (info \| search),` `similar_shape (info \| search),` `similar (info \| search),` `curve_texture (info \| search),` `texture (info \| search),` `parallel (info \| search)`
	AUTHOR	`Andreas Gunnarsson`

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