I read this about fifteen years ago, only once, and for some reason it came to mind yesterday. Remembering what it was about I was able to reconstruct it in only a couple of minutes thought, word perfect as it turned out:
Probable-Possible, my black hen
She lays eggs in the relative when
She doesn’t lay eggs in the positive now
Because she’s unable to postulate how.
I now learn, thanks to the wonder of this interwebby thing, it is from The Space Childs Mother Goose. You think Franny Alexanders ideal and patronising cow of a teacher would approve of stretching children like this?
Here is another I knew, but had no idea it was from the book:
Flappity Floppity Flip
The mouse on the Mobius strip
The strip revolved, the mouse dissolved
in a chronodimensional skip!
I know what I’m buying myself for Christmas.