robinhouston on Nostr: I'm missing some context for this conversation, but I was at the talk you're ...

I'm missing some context for this conversation, but I was at the talk you're discussing. The speaker said, IIRC, that the rationale for making credit cards that size has never been made public, but it's a reasonable guess that it's not a coincidence that you can fit exactly 4 × 4 on a sheet of foolscap.