The gift of the spirit is called the Word Of Knowledge and the Discernment of Spirits which are two of the charismatta of the Holy Spirit outlined in 1 Corinth 12. I use these in prison ministry and the minstry of others and they have never failed me to show what a person's spiritual condition is in the 12 years I have had it. You ought to watch what you say and not get involved in matters that do not concern yourself.
You should know that pride goeth before a fall. As tempting as it is to have it whispered in your ear by some spirit or another, you are not the ultimate judge of what is truth. This age loves to hear how important their own personal judgment is.
SD