All examples in this Bongard Problem are solid black shapes.

BP345 is "Intersection of circle and square vs. union of circle and square."

Adjacent-numbered pages:
BP1267 BP1268 BP1269 BP1270 BP1271  *  BP1273 BP1274 BP1275 BP1276 BP1277

EX1 is ambiguous because it might be a small circle minus a large square, or a small square minus a large circle.

easy, nice, precise, dual

Ben

All examples in this Bongard Problem are scatter plots. Each dot represents a data point.

"Positive correlation" means that when the X value increases, the Y value tends to increase as well (in the long run), while "negative correlation" means that when the X value increases, the Y value tends to decrease.

Adjacent-numbered pages:
BP1266 BP1267 BP1268 BP1269 BP1270  *  BP1272 BP1273 BP1274 BP1275 BP1276

Example TM4854 does not fit on either side because when the X value increases, the Y value stays the same.

Example TM4855 does not fit on either side because there is no correlation.

fuzzy, minimal, unwordable, teach, spectrum, dual, handed, leftright, updown, rotate, stable, hardsort, left-narrow, right-narrow

Ben

This Bongard Problem is a sort of meta-problem. The problems inside the boxes aren't exactly Bongard problems, but they do deal with categorization. The objects must be split into two obvious and distinct groups, but one is not given any examples to work with.

The two sides of BP3 are the same as the two sides in the first box.

Adjacent-numbered pages:
BP1265 BP1266 BP1267 BP1268 BP1269  *  BP1271 BP1272 BP1273 BP1274 BP1275

notso

Ben