[small voice in the wilderness]

Yes, and the Bereans "were more noble than those in Thessalonica, in that they received the word with all readiness of mind, and searched the scriptures daily, whether those things were so." Acts 17:11.

Perhaps they searched other writings themselves and compared them to scripture and found out those things were not so.

[kosta50]

Of course, the Bereans only had the Old Testament. If all they needed was the Old Testament then what was the point of writing the New one?