Luke, I don't know if it's my brain or my methods, but the material I memorize does not stay with me. A couple of months after I've finished a show the lines are essentially gone, at least from conscious recall. I have once repeated a role, after many years, and it was spectacularly easy to re-learn the lines, but they certainly were not there on demand. Some actors can quote lines from plays they did decades ago; I am not one of them.

Peter