If there was a singular Yeshua the Gospels are based on, he would seem to have been considered a rabbi, which implies some learning, although it could have been by oral tradition. Even if he were illiterate, it doesn't seem unlikely that there would be one or two literate men among the disciples. They weren't ALL fomer fishermen.
Very little can be known for certain of these people, but I don't think there's a good case that the entire group was illiterate.
Very little can be known for certain of these people, but I don't think there's a good case that the entire group was illiterate.