We see false conversionas all the time..that is the problem with the Arminian churches.
and the answer is no
is this the way your "demon" spells "conversions"? - ;{) LOL
My brother was drinking quite heavy, did use some illegal drugs, and these things were influencing his life and job. So on the advise of a co-worker some good Baptists took him in and he cleaned up his personal and professional life.
He really did start reading the Bible. He quit attending the LDS church around age 16, so he had only done some reading before that. He had never studied the Bible or read any of our scriptures on his own.
So now my brother seemed by all observations to be thriving in the Word of God quite well.
So again, the question how can you tell who the fakers are?