Plenty of evidence in the Bible for the saints using the "sola scriptura" method to test all doctrine and tradition to "see IF those things are true"
Acts 17
11 Now these were more noble-minded than those in Thessalonica, for they received the word with great eagerness,
examining the Scriptures daily to see IF these things were so.
Luke 24
27 Then
beginning with Moses and with all the prophets, He explained to them the things concerning Himself
in all the Scriptures.
44 Now He said to them, “These are My words which I spoke to you while I was still with you, that
all things which are written about Me in the Law of Moses and the Prophets and the Psalms must be fulfilled.” 45 Then He opened their minds
to understand the Scriptures, 46 and He said to them, “
Thus it is written, that the Christ would suffer and rise again from the dead the third day, 47 and that repentance for forgiveness of sins would be proclaimed in His name to all the nations, beginning from Jerusalem.
And Christ said this - about "Sola Scriptura" testing of church tradition and doctrine.
Mark 7
7 Howbeit in vain do they worship me, teaching for doctrines the commandments of men.
8 For
laying aside the Commandment of God, ye hold the tradition of men, as the washing of pots and cups: and many other such like things ye do.
9 And he said unto them, Full well
ye reject the commandment of God, that ye may keep your own tradition.
10 For
Moses said, Honour thy father and thy mother; and, Whoso curseth father or mother, let him die the death:
11 But ye say, If a man shall say to his father or mother, It is Corban, that is to say, a gift, by whatsoever thou mightest be profited by me; he shall be free.
12 And ye suffer him no more to do ought for his father or his mother;
13
Making the Word of God of none effect
through your tradition, which ye have delivered: and many such like things do ye.
In
Isaiah 8:19 we find this "
to the Law and to the Testimony if they speak not according to this Word there is no light in them".
There again we have sola scriptura - being taught.
And Paul insists that he and everyone else be tested that same way -
Gal 1:6-9
6 I am amazed that you are so quickly deserting Him who called you by the grace of Christ,
for a different gospel; 7 which is
really not another; only there are some who are disturbing you and
want to distort the gospel of Christ. 8 But even
if we, or an angel from heaven, should preach to you a gospel contrary to what we have preached to you,
he is to be accursed! 9 As we have said before, so I say again now,
if any man is preaching to you a gospel contrary to what you received, he is to be
accursed!
We can know what had been preached by Paul as of Gal 1... by reading the texts themselves.