Piles

Conversation with Tevye, looking ruefully at the heaps of books on the bedroom floor ...

Me: I did clear away that pile yesterday, but I started another one.

Tevye: No, you started two piles.

Me: No I didn't.

Tevye: Ah! It's one pile split in two ... (puts one heap on top of the other) ... OK. One pile.

Poor Tevye!