doronshadmi
Penultimate Amazing
- Joined
- Mar 15, 2008
- Messages
- 13,320
Great (OR not great)! Now, what is the definition of successor? ...of complete?
IsSuccessorOf(A,B) <=> ...?
IsComplete(A) <=> ...?
Since being a successor is an optional (non-essential) property of {X}, being a successor is defined exactly by the following wff:
({X} IsSuccessorOf X) OR ({X} ~IsSuccessorOf X).
Since being complete is an optional (non-essential) property of X, being complete is defined exactly by the following wff:
(X is incomplete, in case that {X} IsSuccessorOf X) OR (X is complete, in case that {X} ~IsSuccessorOf X).
Since by your reasoning a useful wff must be of the form X <=> Y, your reasoning can't distinguish between optional (non-essential) and non-optional (essential) properties of mathematical objects.
We actually enable to combine the different optional (non-essential) properties of the primitives {X} and X into a one fruitful mathematical framework, as can be found in the links starting in post http://www.internationalskeptics.com/forums/showpost.php?p=11292718&postcount=1565.
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