If we had dynamic scope, if we evaluated these function bodies, x + y + z, q + y + z, where we called these functions instead of where they were defined, then under dynamic scop, one of these functions would end up using this seventeen and the other one would actually end up with an unidentified variable. because we would try to use q and there would not be any q here, that's actually one of the other reasons we're gonna get to, okay? 