Still haunted by interactions ten years ago with someone who claimed to have invented an impossibly efficient garbage collector supported by revolutionary data

Still haunted by interactions ten years ago with someone who claimed to have invented an impossibly efficient garbage collector supported by revolutionary data structures. You would think this would be empirically verifiable but I nor others could make heads or tails of his argument. When I saw the guy also had a theory of unified physics, I gave up. Still don't know, he might have been onto something.