P: A well-respected physicist claims that the thesis of absolute motion is incoherent P: A thesis that is incoherent cannot be accepted as a description of reality C: motion cannot be absolute
As you can see, this author uses two premises to support their conclusion. The first premise is the assertion of an expert. The second premise is a general principle. Neither premise is an observation of any sort.
Answer choice D says that this argument proceeds by making an inference from an observation under experimental conditions, but the author fo this argument mentioned no observations (and so makes no inferences from any observations.)
