His truth structures were nonsense.
He reminded me of a child, looking out the window, and when you ask them 'What did you do today' they'd look out and see a beach, and they'd reply 'I went to the beach'. Then if you said 'Did you find any shells?', they'd take that and use it, something they hadn't thought of, to expand the lie, perhaps going on to describe the colours.
He simply said whatever interested him, or what he was experiencing at that time.
For example, he told me he was a biochemist, a member of naval intelligence and a frequent, jobless psychopath all within a week of each other.
I imagine these reflected whatever media he was currently enjoying.
I enjoyed humouring him, and simply 'believing' whatever he said at that moment, while asking why the previous lie didn't stand anymore, very paradoxical of me. He liked momentary truths. Though I suspect he thought I was rather stupid and simply so caught up in his brilliance that I would take all he said as law.