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| BP1159 |
| Bongard Problems where examples are only sorted left if nothing indicates that they would be sorted right vs. vice-versa. |
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COMMENTS
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Left-sorted Bongard Problems have the keyword "left-couldbe" on the OEBP.
Right-sorted Bongard Problems have the keyword "right-couldbe".
In a "couldbe" Bongard Problem, some relevant information is left out by the way objects are displayed. Solutions to "left-couldbe" BPs sound like "Could be a ___ vs. definitely not a ___" (and vice versa for "right-couldbe" BPs.)
To put it in mathematical jargon, there is a "projection" function from objects to pictures, such that objects satisfying property X are mapped to the same picture as objects not satisfying property X. Sorted on the "couldbe" side is the image (under projection) of the collection of objects satisfying property X.
Furthermore, usually X is a relatively narrow criterion, so that most objects do not satisfy it (see keywords left-narrow and right-narrow), and all pictures are in the image (under projection) of the collection of objects not satisfying property X. |
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REFERENCE
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Consider BP525, "Cropped image of a circle vs. not so." None of the left-hand examples are definitely an image of a circle, but they fit left because nothing indicates that they are not an image of a circle. A more pedantic solution to this Bongard Problem would be "There is a way of cropping a circle that gives this image vs. there isn't." |
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CROSSREFS
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See also the keyword seemslike, where neither side can be confirmed.
Either "left-couldbe" or "right-couldbe" implies notso.
Although the descriptions of "left-couldbe" and "right-couldbe" sound similar to left-unknowable and right-unknowable, they are not the same. It is the difference between a clear absence of information and perpetual uncertainty about whether there is more information to be found.
"Left-couldbe" is usually left-narrow and "right-couldbe" usually right-narrow.
Adjacent-numbered pages:
BP1154 BP1155 BP1156 BP1157 BP1158 * BP1160 BP1161 BP1162 BP1163 BP1164
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KEYWORD
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dual, meta (see left/right), links, keyword, side, viceversa
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AUTHOR
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Leo Crabbe
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| BP1160 |
| Visual Bongard Problems that would sort an all-black panel on the left vs. visual Bongard Problems that would sort an all-black panel on the right. |
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| BP1161 |
| Image contains the exact arrangement of pixels that form the "S" creature depicted in EX9532 vs. not so. |
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CROSSREFS
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Adjacent-numbered pages:
BP1156 BP1157 BP1158 BP1159 BP1160 * BP1162 BP1163 BP1164 BP1165 BP1166
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KEYWORD
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unwordable, notso, arbitrary, handed, leftright, updown, stretch, blackwhite, creativeexamples, right-null, perfect, pixelperfect, help
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AUTHOR
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Leo Crabbe
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| BP1162 |
| Bongard Problem with solution that can be naturally phrased as "___ vs. vice versa" vs. not so. |
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COMMENTS
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Bongard Problems sorted left obtain the keyword "viceversa" on the OEBP. |
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CROSSREFS
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Contrast the keyword notso.
"Viceversa" BPs are often dual.
The solution to a less-than/greater-than quantity comparison Bongard Problem (keyword spectrum) where the two sides divide the spectrum in half can be phrased as "closer to left end of spectrum than right end vs. vice versa." Whether this is a natural way to phrase the solution depends on the kind of quantity being compared.
Here are some examples of spectra for which the "vice versa" phrasing tends to seem natural: left vs. right, up vs. down, black vs. white, higher quantity of [thing type 1] vs. higher quantity of [thing type 2].
Adjacent-numbered pages:
BP1157 BP1158 BP1159 BP1160 BP1161 * BP1163 BP1164 BP1165 BP1166 BP1167
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KEYWORD
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notso, meta (see left/right), links, keyword, right-self
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AUTHOR
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Aaron David Fairbanks
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| BP1163 |
| Eventually blinks vs. never blinks. |
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| BP1164 |
| Visual Bongard Problems where stretching (or compressing) any sorted example renders the example unsortable vs. visual Bongard Problems where some example can be stretched along some axis and remain sorted. |
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| BP1165 |
| Visual Bongard Problems where all possible sorted examples share a specific black region vs. not so. |
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| BP1166 |
| Visual Bongard Problems whose sorted examples all have a nonzero minimum amount of black in them vs. other visual Bongard Problems. |
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