Radmanovic off the bench

Vladi isn't starting at PF against Tim Duncan or Chris Webber, not like last year.
Lot's of players play out of "position" coming off the bench to fill a role and it depends on matchups. Sometimes he plays SF, sometimes the other team doesn't have a C or PF coming off the bench. If the other team isn't putting a PF on the floor and Vladi is on the floor with Lewis I'm still not calling him a PF. At some point, usually with bench players, the idea of players fitting the 1-5, PG, SG, SF, PF, C positions goes out the window.
Playing 3 guards and a SF and a PF to match another team playing 3 guards and a SF and a PF doesn't mean to me that anybody on the floor is a C.
I'm not putting up an argument, I just don't go for the definition with bench players.