One difference is that Stallman is a reasonable man. If you could put together a watertight argument that proprietary software is better than free software, I

One difference is that Stallman is a reasonable man. If you could put together a watertight argument that proprietary software is better than free software, I think Stallman would become a proprietary software advocate. Is Stallman being uncompromising by rejecting hand-waving arguments, or merely following a logical conclusion based on stronger evidence?