Many Sons of Perdition, Part 2 of Chapter 10 of Judas Iscariot by Ogden Kraut.

Judas as a Son of Perdition Some believe that the number of the Sons of Perdition are so few that they can be counted on the fingers of one hand. Some do not think that even Judas could have been a Son of Perdition–as Joseph F. Smith expressed: To my mind it strongly appears that not one of the disciples possessed sufficient light, knowledge nor wisdom, at the time of the crucifixion, for either exaltation or condemnation; for it was afterward that their minds were opened to understand the scriptures, and that they were endowed with power from on high; without which they were only children in knowledge, in comparison to what they afterwards became under the influence of the Spirit. (Gospel Doctrine, p. 433)