Dumb Question? But I'm curious

[Cleveland Guy]

I know this is highly unlikely, but after watching a repeat of the WSOP where Josh Arieh says " I need another card, I'm not that good" It got me wondering.

What if a guy in the BB is only dealt 1 card. For some odd reason he doesn't realize this, and there are say 2-3 limpers to the flop. He checks blind.

Flop comes QQ3. BB looks down to see a Q and no other card.

Since you only need to make 5 cards, can he play and use the best 2 other cards on the board, meaing he is playing 6 cards to make 5?