A Posteriori (अनुभवजन्य)

An argument based upon the subsequent actual observation or upon experimental data. Such argument/ observations are not existing in the mind prior to or independent of the subsequent observations.

A Priori  (अनुमानतः/ संभवत)

An argument/ ovservation derived from previous event.

The Latin phrases a priori (‘from the earlier’) and a posteriori (‘from the later’) are philosophical terms popularized by Immanuel Kant’s “Critique of Pure Reason”.