René Descartes

Famous French philosopher who did not say “animadverto ergo scio”, or “scribo non ergo non scribo” much less “nego, ergo advocatum sum” though he might have, and he worried about the reality of res extensa in a way a lawyer does not, always.

Descartes’ work was ineffectually questioned by Otto Büchstein in his now forgotten Discourse on Intercourse, who appended to cogito ergo sum his own aphorism convenimus ergo es, based on the a priori inevitability of conference calls.