http://plato.stanford.edu/entries/moore/#2 So, on the face of it, this thesis has here been inferred from Leibniz’ Law. Moore observes, however, that the step from (1) to (2) is invalid; it confuses…
I'm writing this piece as i have gotten rather tired of explaining this point over and over. Writing an article about it saves me time. The form of reasoning goes…
“In the "weak form," it is a sound, harmless, and on occasion useful application of elementary logic: if x is a necessary condition for the existence of y, and y…
I am taking an advanced logic class this semester. Som of the reading material has been posted in our internal system. I'll post it here so that others may get…
1. There is a thing, x, such that it is a contingent proposition. ∃xCx 2. For any thing, x, if x is a contingent proposition then there is a possible…
When explaining the distinction between essential and accidental properties bachelors are often used. The idea of essential properties is this: The distinction between essential versus accidental properties has been characterized…
Removed due to lack of quality.
The much mentioned the modal fallacy is not a fallacy (that is, is a valid inference rule) if one accepts an exotic view about modalities and necessities that is logically…
"[W]hat follows from a true premiss must be true" (The Problems of Philosophy, p. 60, link) Wrote Russell as an example of a principle of logic that is more self-evident…
Unaided and aided reasoning Humans reason about many things. Some things are more complex than other things. The more complex a thing is, the more probably it is that one…