That is whether they were taught by word of epistle. Not all had access to written material. Those scrolls were a little hard to duplicate on a moments notice when a new church was started or a new person was converted. The Catholic Church used that technique to deceive the people for many years. Thank God for the Gutenberg press right. That nonsense of decieving people because of no access to written word was over when printing presses came into being. Notice that coincided with the Reformation.
2 Thessalonians 2:15 Therefore, brethren, stand fast, and hold the traditions which ye have been taught, whether by word, or our epistle.
My own paraphrase would read ...
Hold fast to the Day of the Lord teaching, whether you heard it from us in person when we were here ... or whether you have read it from this epistle.
Like I said yesterday ... they appeal to the broad context when interpreting the church fathers, ignore the broad context when interpreting the Bible.
Bingo!!