I am not denying Paul was referring to the OT Scriptures. But these were copies Timothy had and not the originals. Even if you do not believe Timothy had any copy of Scripture, you cannot make that case with the Ethiopian eunuch. Jesus had read from Isaiah. Yet, the Ethiopian eunuch also read from Isaiah. They cannot both be the same manuscript which would be the original. They were copies. At least the eunuch would have only had a copy of Isaiah and not the original. Now, if you read the story of the Ethiopian eunuch, it says that what he had was called, “Scripture.“ Now, skip over to 2 Timothy 3:16. It says ALL Scripture is given by inspiration of God. So the copy is given by inspiration of God; Not just the originals only.