Don Cheadle and Ayo Edebiri in Proof, at the Booth. Photo: Matthew Murphy/Matthew Murphy Is a Broadway revival of Proof the ultimate theatrical expression of our Y2K nostalgia? Low-rise jeans, Britney Spears, Sex and the City , Proof — god, how we loved them all in 2001. We loved the last one so much that David Auburn won the Tony and the Pulitzer, and auditioners everywhere got tired of listening to brainy theater girls do monologues by the play’s brilliant, angst-ridden protagonist, Catherine.