Everyone that likes to take that verse to "prove" that the bible is inerrant, always seem to forget the rest:
2 Timothy 3
New American Standard Bible (NASB)
“Difficult Times Will Come”
3 But realize this, that in the last days difficult times will come. 2 For men will be lovers of self, lovers of money, boastful, arrogant, revilers, disobedient to parents, ungrateful, unholy, 3 unloving, irreconcilable, malicious gossips, without self-control, brutal, haters of good, 4 treacherous, reckless, conceited, lovers of pleasure rather than lovers of God, 5 holding to a form of godliness, although they have denied its power; Avoid such men as these. 6 For among them are those who enter into households and captivate weak women weighed down with sins, led on by various impulses, 7 always learning and never able to come to the knowledge of the truth. 8 Just as Jannes and Jambres opposed Moses, so these men also oppose the truth, men of depraved mind, rejected in regard to the faith. 9 But they will not make further progress; for their folly will be obvious to all, just as Jannes’s and Jambres’s folly was also.
10 Now you followed my teaching, conduct, purpose, faith, patience, love, perseverance, 11 persecutions, and sufferings, such as happened to me at Antioch, at Iconium and at Lystra; what persecutions I endured, and out of them all the Lord rescued me! 12 Indeed, all who desire to live godly in Christ Jesus will be persecuted. 13 But evil men and impostors will proceed from bad to worse, deceiving and being deceived. 14 You, however, continue in the things you have learned and become convinced of, knowing from whom you have learned them, 15 and that from childhood you have known the sacred writings which are able to give you the wisdom that leads to salvation through faith which is in Christ Jesus. 16 All Scripture is inspired by God and profitable for teaching, for reproof, for correction, for training in righteousness; 17 so that the man of God may be adequate, equipped for every good work.
Context in regards to that verse:
14 You, however, continue in the things you have learned and become convinced of, knowing from whom you have learned them, 15 and that from childhood you have known the sacred writings which are able to give you the wisdom that leads to salvation through faith which is in Christ Jesus. 16 All Scripture is inspired by God and profitable for teaching, for reproof, for correction, for training in righteousness; 17 so that the man of God may be adequate, equipped for every good work.
The scriptures that Timothy learned as a child, that scripture ( all of what he learend) was inspired by God and that those scriptures are good for teaching and correcting and training people in righteousness so that a man of God may be adequate and equipped for good work(s).
This is NOT a comment on the bible or even scripture being anything other than what Timothy learned them to be and what Paul said they can be used for.
In short, the scriptures that Tim learned and HOW he learned to use them, that is how he IS to use them.
