2. Unlearned. Ignorant

Both ἀγπὐμματς. And ἰδιώτς are translated ‘unlearned,' but there is a difference between them. Both words occur in Acts 4:1313Now when they saw the boldness of Peter and John, and perceived that they were unlearned and ignorant men, they marvelled; and they took knowledge of them, that they had been with Jesus. (Acts 4:13): the rulers of Israel perceived Peter and John to be "unlearned (ἀγ.) and ignorant ἰδ.) men." ἀγράμμος (from a neg. and γράμμα ‘a letter ') occurs nowhere else in the N. T., but γράμμα occurs in John 7:1515And the Jews marvelled, saying, How knoweth this man letters, having never learned? (John 7:15): "how knoweth this man ‘letters’?" and in Acts 26:2424And as he thus spake for himself, Festus said with a loud voice, Paul, thou art beside thyself; much learning doth make thee mad. (Acts 26:24): "much ‘learning ' doth make thee mad." These instances show that a7p,i,a,tucrog signifies ‘unlettered.'
ἰδιώτης (from ἰδιος, ‘one's own') has a different signification: it is applied to private persons in distinction from those who are officials or professionals, and so to simple or uninstructed persons. The apostle asks how such a one could say Amen to the giving of thanks by one speaking in a tongue, not understanding what was said, 1 Cor. 14:1616Else when thou shalt bless with the spirit, how shall he that occupieth the room of the unlearned say Amen at thy giving of thanks, seeing he understandeth not what thou sayest? (1 Corinthians 14:16); and in verses 23, 24 he is classed with unbelievers. The word occurs also in 2 Cor. 11:66But though I be rude in speech, yet not in knowledge; but we have been throughly made manifest among you in all things. (2 Corinthians 11:6), where Paul maintains that though he may be simple, or untrained, in speech, he is not so in regard to knowledge.