On Bs Apr 2026

Frankfurt’s most influential contribution is the philosophical distinction between a liar and a "bullshitter":

Is concerned with the truth. To tell a lie, one must first know what the truth is in order to deliberately subvert it.

The primary work on this topic is the seminal essay by moral philosopher Harry G. Frankfurt , originally published in 1986 and later as a standalone book in 2005. The Core Thesis: Bullshit vs. Lying