How many primitives does it take to build a LISP machine? Ten, seven or five?

Question

On this site they say there are 10 LISP primitives. The primitives are: atom, quote, eq, car, cdr, cons, cond, lambda, label, apply.

http://hyperpolygl

Answer 1

Paul Graham implements eval using seven.

In McCarthy's Micro Manual for LISP he implements eval using ten.