He began to study formal logic and began to make strenuous attempts to understand Russell 's paradox which he had learnt through Lukasiewicz .
Siya ay nagsimulang mag-aral ng pormal na lohika at nagsimula na gumawa ng mahirap na susubok na maintindihan Russell 's kabalintunaan na kung saan siya had learnt sa pamamagitan ng Lukasiewicz.