2 Sept 1804

Evidence

Ch. Explanations

For this purpose it will be necessary, to take a view of the principal topics or considerations /sources of argument from the consideration of which the existence or non-existence of this or that individual fact has[?] been wont[?] to be pronounced certain or impossible.

Impossibility - sources of man's persuasion in relation to it - it is merely relative - what to one man is impossible may /to one man/ to another be probable or certain. Such are the topics and propositions a succeeding chapter will under the title of physical impossibility endeavour to bring to view.