Clifford: William Kingdon,
English mathematician and physicist. Precursor of
Einstein's General Theory of Relativity and originator of what are now
known as Clifford algebras.
Originator of what is known as
Clifford's dictum: "It
is wrong always, everywhere, and for anyone, to believe anything upon
insufficient evidence". This is explained in his excellent "The
Ethics of Belief", that concerns the conditions human beliefs of
any kind must satisfy in order to be fairly called rational.