Jean-Claude Binoche, Auctioneer said "Contesting this piece is completely……
Jean-Claude Binoche, Auctioneer said "Contesting this piece is completely ridiculous. And not a single expert in Pre-Colombian art, or an expert worthy of that title, has ever contested it, nor will they ever contest it."
here,what does "single"mean,could you make some sentences with it?

Question

Jean-Claude Binoche, Auctioneer said "Contesting this piece is completely……
Jean-Claude Binoche, Auctioneer said "Contesting this piece is completely ridiculous. And not a single expert in Pre-Colombian art, or an expert worthy of that title, has ever contested it, nor will they ever contest it." 
here,what does "single"mean,could you make some sentences with it?

Answer

not a single = not even one (i.d nobody)

I don't have a single penny.
I'm not interested in a single person here.
Not a single politician can talk the truth.