The On-Line Encyclopedia of Bongard Problems

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BP100

The letter A vs. the letter Б.

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	COMMENTS	`This is the final problem in Bongard's original collection. It is the only member of the collection that makes reference to human culture. This can be interpreted symbolically as foreshadowing that computers will be able to perform the various tasks that humans can do.` `Another idea introduced by this Bongard Problem is that a Bongard Problem can teach its solution to the solver. (See keyword teach.) A large pool of examples can be used for training, as is common in machine learning.`
	REFERENCE	`M. M. Bongard, Pattern Recognition, Spartan Books, 1970, p. 247.`
	CROSSREFS	`Adjacent-numbered pages: BP95 BP96 BP97 BP98 BP99 * BP101 BP102 BP103 BP104 BP105`
	KEYWORD	`easy, nice, teach, arbitrary, anticomputer, culture, finished, bongard`
	CONCEPT	`specific_shape (info \| search),` `specificity (info \| search)`
	AUTHOR	`Mikhail M. Bongard`

BP153

Predominance of curves and hook-like endings vs. predominance of straight lines and staple-like endings.

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	CROSSREFS	`Adjacent-numbered pages: BP148 BP149 BP150 BP151 BP152 * BP154 BP155 BP156 BP157 BP158`
	KEYWORD	`traditional`
	CONCEPT	`line_or_curve_endpoint (info \| search),` `specific_style (info \| search),` `specificity (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

BP154

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`

BP155

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`

BP158

Some slope vs. another slope.

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	CROSSREFS	`Adjacent-numbered pages: BP153 BP154 BP155 BP156 BP157 * BP159 BP160 BP161 BP162 BP163`
	KEYWORD	`dual, arbitrary, rotate, traditional`
	CONCEPT	`line_slope (info \| search),` `specific_value (info \| search),` `specificity (info \| search)`
	AUTHOR	`Harry E. Foundalis`

BP170

Pi-like shape vs. x-like shape.

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	CROSSREFS	`Adjacent-numbered pages: BP165 BP166 BP167 BP168 BP169 * BP171 BP172 BP173 BP174 BP175`
	KEYWORD	`nice, arbitrary, anticomputer, traditional, blackwhiteinvariant`
	CONCEPT	`specific_shape (info \| search),` `specificity (info \| search)`
	AUTHOR	`Harry E. Foundalis`

BP197

Some style (font) vs. another style (font).

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	CROSSREFS	`Adjacent-numbered pages: BP192 BP193 BP194 BP195 BP196 * BP198 BP199 BP200 BP201 BP202`
	KEYWORD	`dual, arbitrary, anticomputer, contributepairs`
	CONCEPT	`specific_style (info \| search),` `specificity (info \| search)`
	AUTHOR	`Harry E. Foundalis`

BP214

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`

BP228

After rotating so that the longest line is horizontal, there is a left arm raised and a weight down vs. after rotating so that the longest line is horizontal, there is a left arm down and a weight raised.

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	CROSSREFS	`Adjacent-numbered pages: BP223 BP224 BP225 BP226 BP227 * BP229 BP230 BP231 BP232 BP233`
	KEYWORD	`convoluted, traditional`
	CONCEPT	`rotation_required (info \| search),` `specific_style (info \| search),` `specificity (info \| search)`
	AUTHOR	`Giuseppe Insana`

BP229

When the objects are rotated and their dots are overlapped and eliminated, they form three-square-tall structures with columns of the same color vs. not so.

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	COMMENTS	`Explanation / justification of BP229 by its creator:` `"Long (doubly sized) objects are purines (A & G).` `Short objects are pyrimidines (C & T).` `Black are those forming triple Hbond (G and C).` `White are those forming double Hbond (A & T).` `On the left we have matching codes, i.e., bases, doublets or triplets that, when rotated, can pair correctly (A with T, G with C), binding the two strands.` `On the right we have objects that no matter how they are rotated they do not pair correctly (because of bumps, wrong color codes, etc)."`
	CROSSREFS	`Adjacent-numbered pages: BP224 BP225 BP226 BP227 BP228 * BP230 BP231 BP232 BP233 BP234`
	KEYWORD	`unorderedpair, traditional`
	CONCEPT	`rotation_required (info \| search),` `tiling (info \| search),` `specific_value (info \| search),` `specificity (info \| search)`
	AUTHOR	`Giuseppe Insana`

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