  The strong interpretation of the criterion required there to be some decision made as to what evidence contributed to the meaning of verifiable sentences. For Ayer it was clear that not all evidence for a statement was to be included in the meaning of the statement: a statement about the blood on Jack’s jacket was not included in the meaning of the assertion that Jack was the murderer. Further, although only present evidence is available to anybody making a statement about the past, the meaning of such a statement is not restricted to such present evidence; one is entitled to include in the meaning evidence that would be available if one were able to transport oneself to that past time. Moral statements were, in Ayer’s view, not verifiable, and so could not be construed as assertions of fact, being interpreted instead as expressions of emotion. This is examined again in Section 7.