How to use "exact" in a sentence

For instance, why may not any portion of a new confederacy a year or two hence arbitrarily secede again, precisely as portions of the present Union now claim to secede from it? All who cherish disunion sentiments are now being educated to the exact temper of doing this."

We immediately began working with him, trying to engineer an exact duplicate of the virus

Dr Haydock then described the appearance of the body and the exact injuries

My brother could get very little exact information out of them