All truth and all error lie in Propositions.—J. S. Mill. In accordance with that experience which directs to the profoundest books for the simplest statements, we turn to Mill's Logic for the philosophy of propositions. The answer to every question which it is possible to frame is contained in a proposition or assertion. Whatever can be an object of belief or even of disbelief, must, when put into words, assume the form of a proposition * * What we call a truth is simply a true proposition; and errors are false propositions. To know the import of all possible propositions would be to know all questions which can be raised, all matters which are susceptible of being either believed or disbelieved. * * Since then the objects of all belief and all inquiry express themselves in propositions, a sufficient scrutiny of propositions and of their varieties will apprise us what questions mankind have asked themselves, and what it the nature of the answers to those questions they have actually thought they had grounds to believe.
'Now the first glance at a proposition shows that it is formed by putting together two names. A proposition, according to the common............