The On-Line Encyclopedia of Bongard Problems

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The right branch begins at a higher point than the left branch vs. the right branch begins at a lower point than the left branch.

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	REFERENCE	`M. M. Bongard, Pattern Recognition, Spartan Books, 1970, p. 236.`
	CROSSREFS	`Adjacent-numbered pages: BP62 BP63 BP64 BP65 BP66 * BP68 BP69 BP70 BP71 BP72`
	KEYWORD	`precise, spectrum, dual, handed, leftright, finished, traditional, continuous, viceversa, bongard`
	CONCEPT	`above_below (info \| search),` `branch_point (info \| search),` `left_right (info \| search),` `on_sides_of_curve (info \| search),` `tracing_line_or_curve (info \| search)`
	WORLD	`curve_tree_one_branch_per_side [smaller \| same \| bigger]`
	AUTHOR	`Mikhail M. Bongard`

Vertical hatched lines vs. horizontal hatched lines.

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	REFERENCE	`M. M. Bongard, Pattern Recognition, Spartan Books, 1970, p. 245.`
	CROSSREFS	`Adjacent-numbered pages: BP90 BP91 BP92 BP93 BP94 * BP96 BP97 BP98 BP99 BP100`
	KEYWORD	`dual, rotate, finished, traditional, bongard`
	CONCEPT	`horizontal (info \| search),` `texture_area (info \| search),` `texture (info \| search),` `vertical (info \| search)`
	AUTHOR	`Mikhail M. Bongard`

Negative slope vs. positive slope.

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	COMMENTS	`All examples feature a white circle and a black circle. The answer refers to the slope of the line connecting the two circles.` `The coloring of the circles is irrelevant.`
	CROSSREFS	`Adjacent-numbered pages: BP101 BP102 BP103 BP104 BP105 * BP107 BP108 BP109 BP110 BP111`
	KEYWORD	`nice, noisy, dual, handed, rotate, orderedpair, traditional`
	CONCEPT	`positive_negative_slope (info \| search),` `line_slope (info \| search),` `imagined_line_or_curve (info \| search),` `imagined_entity (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

Circle on the right of the box vs. circle on the left of the box.

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	CROSSREFS	`Adjacent-numbered pages: BP104 BP105 BP106 BP107 BP108 * BP110 BP111 BP112 BP113 BP114`
	KEYWORD	`noisy, dual, handed, leftright, traditional`
	CONCEPT	`absolute_position (info \| search)`
	AUTHOR	`Douglas R. Hofstadter`

White background vs. black background.

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	CROSSREFS	`Adjacent-numbered pages: BP152 BP153 BP154 BP155 BP156 * BP158 BP159 BP160 BP161 BP162`
	KEYWORD	`dual, boundingbox, blackwhite, traditional, bordercontent`
	CONCEPT	`background (info \| search),` `bounding_box (info \| search),` `outlined_filled (info \| search),` `texture (info \| search)`
	WORLD	`zoom in left (curves_and_fill_shapes_drawing)`
	AUTHOR	`Harry E. Foundalis`

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`

Black region narrows at the boundary of black/white vs. black region widens at the boundary of black/white.

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	CROSSREFS	`Adjacent-numbered pages: BP175 BP176 BP177 BP178 BP179 * BP181 BP182 BP183 BP184 BP185`
	KEYWORD	`nice, dual, traditional`
	CONCEPT	`size_increase_decrease (info \| search),` `outlined_filled (info \| search),` `tracing_line_or_curve (info \| search),` `texture (info \| search)`
	AUTHOR	`Harry E. Foundalis`

Light-colored texture vs. dark-colored texture.

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	COMMENTS	`More white than black vs. more black than white.`
	CROSSREFS	`See BP211 for a version of this Problem that includes as examples more general kinds of images than uniform textures.` `Adjacent-numbered pages: BP191 BP192 BP193 BP194 BP195 * BP197 BP198 BP199 BP200 BP201`
	KEYWORD	`easy, nice, spectrum, dual, blackwhite, traditional, continuous, viceversa, dithering`
	CONCEPT	`light_dark (info \| search),` `texture_area (info \| search),` `texture (info \| search)`
	WORLD	`[smaller \| same \| bigger] zoom in left \| zoom in right`
	AUTHOR	`Harry E. Foundalis`

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`

More black than white vs. more white than black.

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	CROSSREFS	`See BP196 for a version of this Problem restricted to uniform textures.` `Adjacent-numbered pages: BP206 BP207 BP208 BP209 BP210 * BP212 BP213 BP214 BP215 BP216`
	KEYWORD	`easy, nice, spectrum, dual, blackwhite, unstable, right-null, perfect, pixelperfect, traditional, continuous, viceversa, bordercontent`
	CONCEPT	`outlined_filled (info \| search),` `size (info \| search),` `texture (info \| search)`
	WORLD	`bmp [smaller \| same \| bigger] zoom in left \| zoom in right`
	AUTHOR	`Giuseppe Insana`

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