Re: An argument against modus ponens

John Jones wrote:
OP wrote:
John Jones wrote:
Modus Ponens:
If P, then Q.
P. Therefore, Q.

The "If" announces a truth value. So "if P" requires the consideration of another element or object through which a truth value may be ascertained.

Why does "if P" require the consideration of another element or object through which a truth value may be ascertained?

"If P" does not mean this: P may be presented or may not be presented.
Rather, "If P" requires us to consider the non-representation of P as an element.

So if "if P" turns out for P (P is true), and not for the other, unnamed element (R, as I term it) we still need to entertain the idea of that element (R) which P is not if we want to retain the ontological significance of "if" statements.

"If P" then, says P, R. In fact, simply "if" says P, R.

I notice that you did not answer my question. I asked why "if P" requires the consideration of another element or object, etc., and you replied "'if p' requires us to consider the non-representation of P as an element." Which is exactly what I was asking you to explain.
.

Relevant Pages

  • Re: The underdetermination of disjunction
    ... If A and B are propositions, then the conjunction 'A and B' is a proposition. ... John Jones is a schizophrenic. ... (Concerning its "nature" I'd ... I can't make any claims regarding the truth of "A and B" from the truths ...
    (sci.logic)
  • Re: The problematic connective
    ... John Jones wrote: ... allows two truths to be reduced to one truth. ... The simplist kind of proposition, an elementary proposition, ... A proposition is a truth-function of elementary propositions. ...
    (sci.logic)
  • Re: My talk about Godel to the post-grads.
    ... John Jones writes: ... of 'philosophy' - "the claims of truth made within a subject are less ... - Ludwig Wittgenstein, Tractatus Logico-Philosophicus ...
    (sci.logic)
  • Re: The underdetermination of disjunction
    ... "It is true that the number of deaths caused by drink is 1000, ... I can't make any claims regarding the truth of "A and B" from the truths ... John Jones does not know what he's talking about ... John Jones is an idiot and John Jones does not know what he's ...
    (sci.logic)
  • Re: An argument against modus ponens
    ... John Jones writes: ... of another element or object through which a truth value may be ... "If I were only dafter ... I might be making hymns ...
    (sci.logic)