Concerning doctrines, Paul told Timothy that the problem was not with doctrine in general but that some were departing from sound doctrine and promulgating fables instead. Paul's view of sound doctrine is shown in what he decided to put to the Corinthians. He determined not to know anything among them save Christ and Him crucified. Therefore sound doctrine centres around Christ and His shed blood on the Cross.
Interpretations around whether YEC or OEC is more accurate are fodder for interesting and stimulating debate, but it is a sideline to the important doctrinal matters that are crucial to our salvation in Christ. The Trinity, for example, is crucial for our salvation, even though the word "Trinity" is not actually used. But there is sufficient evidence that there is a Father, and a Son, and a Holy Spirit, and they are referred to as God, and yet they are three separate persons. But this is somewhat off topic.
Good points. Indeed the 'sound doctrine' in that verse is about the correct/real understanding of who Christ is and what we must do to be saved -- to believe in Christ and be baptized, and we don't need to be circumcised, etc. -- and that we rely on
Christ....therefore not a combination of stuff, like a little bit of Christianity, some B'aal thrown in, maybe Jupiter, some soothsayers, this and that...).
And that they emphasize (as Paul did) the
actual gospel of salvation through faith in Christ, instead of other gospels people come up with.
1 In the presence of God and of Christ Jesus, who will judge the living and the dead, and in view of his appearing and his kingdom, I give you this charge:
2 Preach the word; be prepared in season and out of season; correct, rebuke and encourage—with great patience and careful instruction.
3 For the time will come when people will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear.
4 They will turn their ears away from the truth and turn aside to myths.
5 But you, keep your head in all situations, endure hardship, do the work of an
evangelist, discharge all the duties of your ministry.