It's not about "fair"....it's about "Truth". I think you learn how to identify falsehood and false teaching by already knowing and understanding the word of God....and study of.
Those who are taught how to identify counterfeit money are NOT taught what the phony stuff is....they are taught inch by inch, in every minute detail, what 'true' bills look like and are. Thus they can identify the false bills because they are well familiar with what is “real” (truth)
Can't disagree with that.
2Ti 3:13 But evil men and impostors will grow worse and worse, deceiving and being deceived.
2Ti 3:14 But you must continue in the things which you have learned and been assured of, knowing from whom you have learned them,
2Ti 3:15 and that from childhood you have known the Holy Scriptures, which are able to make you wise for salvation through faith which is in Christ Jesus.
2Ti 3:16 All Scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness,
2Ti 3:17 that the man of God may be complete, thoroughly equipped for every good work.
The problem today is that there are very few who know (or want to know!) scripture well enough to combat false teachings and thus avoid being deceived.