Very interesting article. Post 9-11, the government is better at knowing the DOB of people legally entering the country. However, mistakes can still be made. With that said, if there are questions about Ansah's age, you have to drop him.
I like Ansah, but what is interesting to me about him is his upside based his athletic ability coupled with his inexperience. However, if there is any question he is older than he is saying, you cannot take him early. Let Olivier Vernon develop and sign a situational vet pass rusher IMO.