"Why do n't you write Dr. Olsen and ask him if this is true ?"
"`` True `` is not a good use of language to describe opinion . With regard to his opinion , I think he makes some good points , so I do n't really need to ask him if its true . You on the other hand do need to speak to Olsen as you are claiming his letter rubbishes the concept of evolution- an opinion I hazard he would very much disagree with ."
"Why do n't you write Dr. Olsen and ask him if this is true ?"
"True `` is not a good use of language to describe opinion"