Question:
Based on the premise "Obviously somebody must have crept up behind him as he listened and struck him down with a blow on the head.", can we conclude that "He got a head injury"?
****
Answer:
yes

Question:
Based on the premise "and i enjoy it it's relaxing and you kind of get absorbed in it so the time goes by you know before you realize anything's going on and i play the organ sometimes uh just for my own satisfaction not for anybody else's ears because i'm not that good at it but i like to bang the keyboards once in a while how about yourself", can we conclude that "I play the organ every chance I get even though I'm not very good."?
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Answer:
it is not possible to tell

Question:
Based on the premise "In the Eglise Saint-Trophime (Place de la R??publique), you can see the Roman influence recurring in the triumphal-arch design of its splendid porch.", can we conclude that "The Eglise Saint-Trophime has clear Roman influence."?
****
Answer:
yes