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BP52 Arrows pointing in different directions vs. arrows pointing in the same direction.
(edit; present; nest [left/right]; search; history)
REFERENCE

M. M. Bongard, Pattern Recognition, Spartan Books, 1970, p. 231.

CROSSREFS

Adjacent-numbered pages:
BP47 BP48 BP49 BP50 BP51  *  BP53 BP54 BP55 BP56 BP57

KEYWORD

finished, traditional, bongard

CONCEPT arrow (info | search),
tracing_lines_or_curves_meet (info | search),
pointing_to (info | search),
tracing_line_or_curve (info | search),
imagined_point (info | search),
imagined_entity (info | search)

AUTHOR

Mikhail M. Bongard

BP78 Extensions of segments cross at one point vs. extensions of segments do not cross at one point.
(edit; present; nest [left/right]; search; history)
REFERENCE

M. M. Bongard, Pattern Recognition, Spartan Books, 1970, p. 239.

CROSSREFS

Adjacent-numbered pages:
BP73 BP74 BP75 BP76 BP77  *  BP79 BP80 BP81 BP82 BP83

KEYWORD

finished, unorderedtriplet, traditional, bongard

CONCEPT all (info | search),
lines_coincide (info | search),
imagined_point (info | search),
imagined_line_or_curve (info | search),
imagined_entity (info | search)

WORLD

three_segments [smaller | same | bigger]

AUTHOR

Mikhail M. Bongard

BP102 Internal arrows point outward vs. internal arrows point inward.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP97 BP98 BP99 BP100 BP101  *  BP103 BP104 BP105 BP106 BP107

KEYWORD

traditional

CONCEPT arrow (info | search),
between (info | search),
tracing_lines_or_curves_meet (info | search),
tracing_line_or_curve (info | search),
imagined_point (info | search),
imagined_entity (info | search)

AUTHOR

Douglas R. Hofstadter

BP104 One circle passes through the center of the other circle vs. no circle passes through the center of the other circle.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP99 BP100 BP101 BP102 BP103  *  BP105 BP106 BP107 BP108 BP109

KEYWORD

precise, unorderedpair, traditional

CONCEPT on_line_or_curve (info | search),
center_of_circle (info | search),
center (info | search),
imagined_point (info | search),
imagined_entity (info | search)

AUTHOR

Douglas R. Hofstadter

BP117 Triangle points to center of circle vs. triangle does not point to center of circle.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP112 BP113 BP114 BP115 BP116  *  BP118 BP119 BP120 BP121 BP122

KEYWORD

traditional

CONCEPT between (info | search),
on_line_or_curve (info | search),
midpoint (info | search),
pointing_to (info | search),
center_of_circle (info | search),
center (info | search),
imagined_point (info | search),
imagined_line_or_curve (info | search),
imagined_entity (info | search),
triangle_arrow (info | search),
triangle (info | search)

AUTHOR

Douglas R. Hofstadter

BP133 Dots collinear with center of circle vs. dots not collinear with center of circle.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP128 BP129 BP130 BP131 BP132  *  BP134 BP135 BP136 BP137 BP138

KEYWORD

traditional

CONCEPT all (info | search),
collinear (info | search),
center_of_circle (info | search),
center (info | search),
imagined_point (info | search),
imagined_entity (info | search)

AUTHOR

Douglas R. Hofstadter

BP134 Circle centers are collinear vs. circle centers are not collinear.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP129 BP130 BP131 BP132 BP133  *  BP135 BP136 BP137 BP138 BP139

KEYWORD

traditional

CONCEPT all (info | search),
collinear (info | search),
center_of_circle (info | search),
center (info | search),
imagined_point (info | search),
imagined_entity (info | search)

AUTHOR

Douglas R. Hofstadter

BP161 Midpoints are collinear vs. midpoints are not collinear.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP156 BP157 BP158 BP159 BP160  *  BP162 BP163 BP164 BP165 BP166

KEYWORD

nice, unorderedtriplet, traditional

CONCEPT all (info | search),
collinear (info | search),
midpoint (info | search),
imagined_point (info | search),
imagined_entity (info | search)

AUTHOR

Harry E. Foundalis

BP162 Every other side, if extended, passes through one point vs. not so.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP157 BP158 BP159 BP160 BP161  *  BP163 BP164 BP165 BP166 BP167

KEYWORD

hard, noisy, traditional

CONCEPT lines_coincide (info | search),
every_other (info | search),
imagined_point (info | search),
imagined_line_or_curve (info | search),
imagined_entity (info | search)

AUTHOR

Harry E. Foundalis

BP178 Center of circle in triangle perpendicular to the other two vs. not so.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP173 BP174 BP175 BP176 BP177  *  BP179 BP180 BP181 BP182 BP183

KEYWORD

traditional

CONCEPT center_of_circle (info | search),
center (info | search),
imagined_point (info | search),
imagined_entity (info | search),
triangle (info | search)

AUTHOR

Harry E. Foundalis

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