1001Philosophers

Stanislaw Lesniewski Quotes on Truth

Stanislaw Lesniewski was a Polish logician, philosopher of mathematics, and the most uncompromising formalist of the Lwow-Warsaw school. This page collects quotes attributed to Stanislaw Lesniewski on the topic of truth, drawn from across the philosopher's works.

Quotes

  • Attributed to Stanislaw Lesniewski:

    “Logic must rest on principles whose evidence we cannot doubt.”

  • Attributed to Stanislaw Lesniewski:

    “A class is the whole of its members, not a thing apart.”

  • Attributed to Stanislaw Lesniewski:

    “Definition must be eliminable without loss.”

  • Attributed to Stanislaw Lesniewski:

    “Formal systems are the precise instruments of philosophical thought.”

  • Attributed to Stanislaw Lesniewski:

    “What can be said clearly must first be axiomatized.”