Bongard Problems sorted left have the keyword "time" on the OEBP.
"Time" implies the culture keyword.
"Time" Bongard Problems tend to be invalid Bongard Problems.
Adjacent-numbered pages: BP505 BP506 BP507 BP508 BP509  *  BP511 BP512 BP513 BP514 BP515
BP504 (the page for the stub keyword) will change the way it sorts Bongard Problem pages over time.
meta (see left/right), links, keyword, invariance, left-it, feedback
bp [smaller | same | bigger]
Aaron David Fairbanks