Left-sorted Bongard Problems have the keyword "left-unknowable" on the OEBP.

Right-sorted Bongard Problems have the keyword "right-unknowable".

Think of searching for needles in endless haystacks. You can be sure a haystack has a needle by finding it, but you can never be sure a haystack does not have a needle.

If a Bongard Problem is (say) "left-unknowable", then any individual example cannot be determined for certain to fit left, by any means. The author of the Bongard Problem just chooses some examples that seem to fit left. (See also the "noproofs" keyword right-BP1125.)

Left- and right- unknowable Bongard Problems tend to be "notso" Bongard Problems (left-BP867)

Right-unknowable Bongard Problems are often "left-narrow" (left-BP514), and left-unknowable Bongard Problems are often "right-narrow" (left-BP513).

Left- and right- unknowable Bongard Problems also tend to have the keyword "creativeexamples" (left-BP866).

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Bongard Problems such that examples are always by default sorted left, until some unforeseen way of fitting right is noticed (a person is never "sure" something should fit left, but can be "sure" something fits right) vs. vice versa.

Bongard Problems such that examples are always by default sorted left, until some unforeseen way of fitting right is noticed (the solver is never "sure" something should fit right, but can be "sure" something fits right) vs. vice versa.

Left-sorted Bongard Problems have the keyword "left-unknowable" on the OEBP.

Right-sorted Bongard Problems have the keyword "right-unknowable".

If a Bongard Problem is (say) "left-unknowable", then any individual example cannot be determined for certain to fit left, by any means. The author of the Bongard Problem just chooses some examples that seem to fit left. (See also the "noproofs" keyword right-BP1125.)

Left- and right- unknowable Bongard Problems tend to be "notso" Bongard Problems (left-BP867)

Right-unknowable Bongard Problems are often "left-narrow" (left-BP514), and left-unknowable Bongard Problems are often "right-narrow" (left-BP513).

Left- and right- noticed Bongard Problems also tend to have the keyword "creativeexamples" (left-BP866).

There are also the keywords "left-noticed" (left-BP1126) and "right-noticed" (left-BP1127). Any Bongard Problem "unknowable" for some side is also "noticed" for the opposite side.

There are also the keywords "left-undecidable" (left-BP1126) and "right-undecidable" (left-BP1127). A Bongard Problem is "left-undecidable" in case there is no general method to determine examples fitting left fit left (although some individuals may be determined to fit left). If a Bongard Problem is "right-noticed", then every individual example fitting left cannot be determined to fit left, by any means.

Any Bongard Problem "noticed" for a side is also "undecidable" for the opposite side.

There are also the keywords "left-undecidable" (left-BP1126) and "right-undecidable" (left-BP1127). A Bongard Problem is "left-undecidable" in case there is no general method to determine examples fitting left fit there, although some individuals may be determined to fit left. If a Bongard Problem is "right-noticed", then every individual example fitting left cannot be determined to fit left, by any means.

Any Bongard Problem "noticed" for a side is also "undecidable" for the opposite side.

Left-sorted Bongard Problems have the keyword "left-noticed" on the OEBP.

Right-sorted Bongard Problems have the keyword "right-noticed".

Left- and right- noticed Bongard Problems tend to be "notso" Bongard Problems (left-BP867)

Left-noticed Bongard Problems tend to be "left-narrow" (left-BP514), and right-noticed Bongard Problems tend to be "right-narrow" (left-BP513).

Left- and right- noticed Bongard Problems also tend to have the keyword "creativeexamples" (left-BP866).

Left-sorted Bongard Problems have the keyword "left-noticed" on the OEBP.

Right-sorted Bongard Problems have the keyword "right-noticed".

Left- and right- noticed Bongard Problems tend to be "notso" Bongard Problems (left-BP867)

Left-noticed Bongard Problems tend to be "left-narrow" (left-BP514), and right-noticed Bongard Problems tend to be "right-narrow" (left-BP513).

Left- and right-notived Bongard Problems also tend to have the keyword "creativeexamples" (left-BP866).

Left-sorted Bongard Problems have the keyword "left-noticed" on the OEBP.

Right-sorted Bongard Problems have the keyword "right-noticed".

Left- and right- noticed Bongard Problems are "notso" Bongard Problems (left-BP867)

Left-noticed Bongard Problems tend to be "left-narrow" (left-BP514), and right-noticed Bongard Problems tend to be "right-narrow" (left-BP513).

Left- and right-notived Bongard Problems tend to have the keyword "creativeexamples" (left-BP866).

There are also the keywords "left-undecidable" (left-BP1126) and "right-undecidable" (left-BP1127). A Bongard Problem is "left-undecidable" in case there is no general method to determine examples fitting left fit there, although some individuals may be determined to fit left. If a Bongard Problem is "right-noticed", then every individual example fitting left cannot be determined to fit left, by any means. (And likewise flipping "left" and "right".)

Any Bongard Problem "noticed" for a side is also "undecidable" for the opposite side.

There are also the keywords "left-uncertain" (left-BP1126) and "right-uncertain" (left-BP1127). A Bongard Problem is "left-uncertain" in case there is no general method to determine examples fitting left fit there, although some individuals may be determined to fit left. If a Bongard Problem is "right-noticed", then every individual example fitting left cannot be determined to fit left, by any means. (And likewise flipping "left" and "right".)

Any Bongard Problem "noticed" for a side is also "uncertain" for the opposite side.

There are also the keywords "left-uncertain" (left-BP1126) and "right-uncertain" (left-BP1127). A Bongard Problem is "left-uncertain" in case there is no general method to determine examples fitting left fit there, although some individuals may be determined to fit left. If a Bongard Problem is "right-noticed", then every example fitting left cannot be determined to fit left. (And likewise flipping "left" and "right".)

Any Bongard Problem "noticed" for a side is also "uncertain" for the opposite side.

There are also the keywords "left-uncertain" (left-BP1126) and "right-uncertain" (left-BP1127). A Bongard Problem is "left-uncertain" in case there is no general way to determine examples fitting left fit there, although some individuals may be determined to fit left. If a Bongard Problem is "right-noticed", then every example fitting left cannot be determined to fit left. (And likewise flipping "left" and "right".)

Any Bongard Problem "noticed" for a side is also "uncertain" for the opposite side.

There are also the keywords "left-uncertain" (left-BP1126) and "right-uncertain" (left-BP1127). A Bongard Problem is "left-uncertain" in case there is no general way to determine examples fitting left fit there, although some individuals may be determined to fit left. When a Bongard Problem is "right-noticed", every example fitting left cannot be determined to fit left. And likewise flipping "left" and "right".

Any Bongard Problem "noticed" for a side is also "uncertain" for the opposite side.

There are also the keywords "left-uncertain" (left-BP1126) and "right-uncertain" (left-BP1127). A Bongard Problem is "left-uncertain" in case examples fitting left cannot in general be determined to fit there. A Bongard Problem is "right-noticed" in case every example fitting left cannot be determined to fit there (while every example fitting right can). And likewise flipping "left" and "right".

Any Bongard Problem "nnoticed" for a side is also "uncertain" for the opposite side.

There are also the keywords "left-uncertain" (left-BP1126) and "right-uncertain" (left-BP1127). A Bongard Problem is "left-uncertain" in case some examples fitting left cannot be determined to fit there. A Bongard Problem is "right-noticed" in case every example fitting left cannot be determined to fit there (while every example fitting right can). And likewise flipping "left" and "right".

Any Bongard Problem "nnoticed" for a side is also "uncertain" for the opposite side.

Bongard Problems such that examples are always by default sorted right, until some unforeseen way of fitting left is noticed (the solver is never "sure" something should fit right, but can be "sure" something fits left) vs. vice versa.

Bongard Problems such that examples are always by default sorted right, until some unforeseen way of fitting left is noticed (the solver is never "sure" something should fit left, but can be "sure" something fits right) vs. vice versa.

There are also the keywords "left-uncertain" (left-BP1126) and "right-uncertain" (left-BP1127). A Bongard Problem is "left-uncertain" in case some examples fitting left cannot be determined to fit there. A Bongard Problem is "right-noticed" in case every example fitting left cannot be determined to fit there (while every example fitting on the opposite side can). And likewise flipping "left" and "right".

Any Bongard Problem "nnoticed" for a side is also "uncertain" for the opposite side.

Bongard Problems such that examples are always by default sorted right, until some unforeseen way of fitting right is noticed (the solver is never "sure" something should fit left, but can be "sure" something fits right) vs. vice versa.

Left-sorted Bongard Problems have the keyword "left-noticed" on the OEBP.

Right-sorted Bongard Problems have the keyword "right-noticed".

Left-noticed Bongard Problems tend to be "left-narrow" (left-BP514), and right-noticed Bongard Problems tend to be "right-narrow" (left-BP513).

Either tend to have the keyword "creativeexamples" (left-BP866).

There are also the keywords "left-uncertain" (left-BP1126) and "right-uncertain" (left-BP1127). A Bongard Problem is "left-uncertain" in case some examples fitting left cannot be determined to fit there. A Bongard Problem is "right-noticed" in case every example fitting left cannot be determined to fit there (while every example fitting on the opposite side can). And likewise flipping "left" and "right".

Any Bongard Problem "noticable" for a side is also "uncertain" for the opposite side.

There are also the keywords "left-uncertain" (left-BP1126) and "right-uncertain" (left-BP1127). A Bongard Problem is "uncertain" for a side in case some examples fitting on that side cannot be determined to fit there; a Bongard Problem is "alwaysuncertain" for a side in case every example fitting on that side cannot be determined to fit there while every example fitting on the opposite side can.

Any Bongard Problem "alwaysuncertain" for a side is also "uncertain" for that side.

There are also the keywords "left-uncertain" (left-BP1126) and "right-uncertain" (left-BP1127). A Bongard Problem is "uncertain" for a side in case some examples fitting on that side cannot be determined to fit there; a Bongard Problem is "alwaysuncertain" for a side in case every example fitting on that side cannot be determined to fit there (and every example fitting on the opposite side can).

Any Bongard Problem "alwaysuncertain" for a side is also "uncertain" for that side.