How do we know what is real and what is counterfeit? 

~ Well. We first need to be well-acquainted with the real, before the counterfeit. Counterfeits are always parasitical upon the originals.  We need to spend more time with the truth, than with a lie. 

“Finally, brothers and sisters, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable—if anything is excellent or praiseworthy—think about such things.” ~ Philippians 4:8