Left-sorted BPs have the keyword "notso" on the OEBP.

On the OEBP, the "not" side is conventionally the right side.

When one property is "positive-feeling" property and its opposite is "negative-feeling", that usually means the negative property wouldn't be recognized without counter-examples (e.g. a collection of "non-triangle shapes" will just be interpreted as "shapes" unless triangles are shown opposite them), while the positive property would be recognized without counter-examples (e.g. a collection of triangles will be seen as such).

BP513 (keyword "left-narrow") is about Bongard Problems whose left side can be recognized without the right side. Thus, "Not so" Bongard Problems are usually "left-narrow" (left-BP513) and not "right-narrow" (BP514).

See BP1001 for the semimeta version.

"[Property A] vs. not so" BPs are usually assigned keyword "wholesort" (left-BP509)--that is, they sort all relevant examples--unless there exist ambiguous border cases, unclear whether having [Property A] or not.

Left-sorted BPs have the keyword "notso" on the OEBP.

On the OEBP, the "not" side is conventionally the right side.

When one property is "positive-feeling" property and its opposite is "negative-feeling", that usually means the negative property wouldn't be recognized without counter-examples (e.g. a collection of "non-triangle shapes" will just be interpreted as "shapes" unless triangles are shown opposite them), while the positive property would be recognized without counter-examples (e.g. a collection of triangles will be seen as such).

BP513 (keyword "left-narrow") is about Bongard Problems whose left side can be recognized without the right side. "Not so" Problems are usually "left-narrow" (left-BP513) and not "right-narrow" (BP514).

See BP1001 for the semimeta version.

"[Property A] vs. not so" BPs are usually "wholesort" BPs (left-BP509), unless there are some ambiguous border cases, unclear whether they have [Property A] or not.

Left-sorted BPs have the keyword "notso" on the OEBP.

When one property is "positive-feeling" property and its opposite is "negative-feeling", that usually means the negative property wouldn't be recognized without counter-examples (e.g. a collection of "non-triangle shapes" will just be interpreted as "shapes" unless triangles are shown opposite them), while the positive property would be recognized without counter-examples (e.g. a collection of triangles will be seen as such).

See left-BP513 (keyword "left-narrow") for Bongard Problems whose left side can be recognized without the right side.

On the OEBP, the "not" side is conventionally the right side.

Left-sorted BPs have the keyword "notso" on the OEBP.

When one property is "positive-feeling" property and its opposite is "negative-feeling", that usually means the negative property wouldn't be recognized without counter-examples (e.g. a collection of "non-triangle shapes" will just be interpreted as "shapes" unless triangles are shown opposite them), while the positive property would be recognized without counter-examples (e.g. a collection of triangles will be seen as such). See left-BP513 (keyword "left-narrow") for Bongard Problems whose left side can be recognized without the right side.

On the OEBP, the "not" side is conventionally the right side.

See BP1001 for the semimeta version.

"Not so" Problems are often "wholesort" Problems (left-BP509).

"Not so" Problems are usually "left-narrow" Problems (left-BP513) and not "right-narrow" Problems (BP514).

Left examples have the keyword "notso" on the OEBP.

We cannot expect to include all the fitting left (or right) examples on the OEBP here.

"Not so" Problems are closely related to "wholesort" Problems (left-BP509).

On the OEBP, the "not" side is conventionally the right side.

"Not so" Problems are typically narrow on on the left side (left-BP513) and not narrow on the right side (right-BP514). This will not be true in a "small enough" world where both sides are narrow. In these cases it is sometimes not clear which side is more naturally interpreted as "not" its opposite.