👉 Subpellucidness is a philosophical concept in the philosophy of mathematics that refers to the condition or state of being irrational. It was introduced by John Wallis, an English mathematician and philosopher, in his work "De Logica" (On Logic). The term was later used by other philosophers, such as Gottfried Leibniz and Arthur Tait, who also emphasized the importance of irrational numbers in mathematical analysis. Subpellucidness is a condition where numbers are considered to be irrational
