Script: Stan Lee Pencils and Inks: Steve Ditko
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holders.
(Systematic ambiguity)
The Contradictory
Function:
with argument p (any proposition) is the proposition
which is contradictory of p, asserting p is not p.
~p = not p or the negation of the proposition p.
The Logical Sum:
is a propositional function with two arguments p and q and the proposition
asserting p and q disjunctively, asserting that at least one of the two p and q
is true.
p v q is the logical sum of p and q.
p v q means at least p or q is true, not
exclusive of the case that both are true.
The Logical
Pretext:
asserts both p and q conjunctively, therefore both p and q are true, denoted p
`q or p:q or p:.q or p::q all mean both p and q are true.
Also true for ~p or ~q must be false:
p .
q = ~(~p v ~q)
The Implicative
Function:
is a proposition with two arguments p and q, and that either ‘not p’ or q is
true or
~p v q. Thus if p is true,
~p is false, and accordingly the only alternative left by the proposition ~p v q is that q is true. In other words
if p and ~p v q are both true, then
q is true. In this sense the proposition ~p v q will be quoted as p implies q.
The
symbol employed for p implies q or “~p v
q” is p É q
p É q
may also be read “if p, then q.”
The association of implication with the use of an
apparent variable produces an extension called “formal implication.” (explained
later) It is an idea derived from “implication” as defined above.
When it is necessary explicitly to discriminate
“implication” from “formal implication,” it is called “material implication.”
These four functions of propositions are the
fundamental constant (i.e. definite) propositional functions with propositions
as arguments, and all other constant propositions as arguments in the present
work, are formed out of them by successive steps. No variable propositional functions of this kind occur in this work.
Dan DeCarlo The
greatest of all time comic book artist! Archie Andrews
and Betty Cooper
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In approaching this subject I urge you
to see it as a work of metaphysics rather than mathematics. Memorization is not
necessary or particularly useful in understanding it. Following posts will
contain thousands of words expressing very concise and useful information,
but all without a single subject to serve as glue to hold it together. This “glue”
is to be your mind and your thought process. All of the material to come must
be processed into our consciousness, and the device to make this happen is the
work, Principia Mathematica, itself.
The authors carefully point out that
the reason for this work is to train the mind to function without rules. They
describe rules for various purposes of learning the material, but are clear
that these can and must be left behind as the dharma takes hold and is put to
practice. As the heading Systematic Ambiguity implies the purpose of dealing
with any complex problem begins with establishing propositions of various
functions and their relations. It is the essential function of this work to set
out a clear vocabulary and hierarchy we may use to think of and communicate
complexity in a manageable and intelligible manner.
*Note* Please be patient, the Indian connection will become apparent eventually if it is to clear already.
*Note* Please be patient, the Indian connection will become apparent eventually if it is to clear already.
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