Full Idea
We cannot explicate a useful notion of verisimilitude in terms of the number of truths and the number of falsehoods generated by a theory, because they are infinite.
Clarification
'Verisimilitude' is the idea of 'tending towards to the truth', or getting closer to it
Gist of Idea
Theories generate infinite truths and falsehoods, so they cannot be used to assess probability
Source
W.H. Newton-Smith (The Rationality of Science [1981], III.4)
Book Reference
Newton-Smith,W.H.: 'The Rationality of Science' [RKP 1981], p.55