good point
I have his (Paul Tipler's) college physics book beside me and even taught physics from it and I still didn't get that distinction until you brought it up...
I don't what has prompted Frank Tipler to evangelize about his 'Omega Point' nonsense- its sad, because it is the antithesis of science. Frank Tipler has done some interesting speculative stuff, for instance his argument on the Fermi Paradox based on the possibility of Von Neuman machines. (Its an interesting argument if you accept his assumptions)...