Roger’s motto: challenge belief.
A favourite argument starter:
“You are only a figment of my imagination.”
The skeptic’s game begins …
It’s fun.
Ends in frustration.

Rene Descartes - French Mathematician, Philosopher - who had the insight: cogito ergo sum - I think therefore I am.
Favourite response:
“I am imagining some bloke called Roger,
who is telling me I am a figment of his imagination.
I am real, he isn’t.”
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