What is invincible ignorance?

What are “vincible” and “invincible” ignorance?

Dear Sub,

Invincible ignorance is ignorance that is involuntary. The person is morally innocent. Here is an article on it from “This Rock” magazine by Jimmy Akin:
catholic.com/thisrock/1999/9907chap.asp

Fr. Vincent Serpa, O.P.

DISCLAIMER: The views and opinions expressed in these forums do not necessarily reflect those of Catholic Answers. For official apologetics resources please visit www.catholic.com.