J
JapaneseKappa
Guest
First off, the negation of the PSR is not “nothing has sufficient reason” or “everything has insufficient reason” but rather “Not everything has sufficient reason.”Well, no, the PSR and “its variants” are not based upon inductive reasoning. The PSR is recognized as a first principle of reasoning – which is why it is called the Principle of Sufficient Reason… In short, science, philosophy and logic are all grounded upon the truth (and acceptance) of the PSR, because without it we have no reason for thinking anything at all about anything at all. It is the dividing line between rationality and irrationality. Certainly, you are free to be irrational or to accept the unreal as real, but you would be doing that for no reason whatsoever except caprice. Good luck with that, but don’t expect anyone reasonable to be convinced…
Second, it is called the Principle **of **Sufficient Reason, not The Principle Sufficient for Reasoning.
This is simply not true. If it were true, then the PSR would not be controversial among philosophers.If you throw out the PSR “and its variants” then you have no grounds upon which to know that anything whatsoever is or can be true.
You seem to be mixing up a handful of different ideas.What you are mistaking is how the principle came to be recognized as a first principle – i.e., through human experience – with its logical necessity as the foundation for human reasoning. The truth of something does not depend upon how it came to be believed – genetic fallacy…
The PSR is axiomatic to reasoning. That is, if you subscribe to reasoning at all as a process for coming to know anything at all about reality then the PSR must hold, necessarily – just as mathematical axioms hold necessarily within their respective systems. The PSR is axiomatic within reason itself.
First: It is perfectly reasonable to build up an axiomatic system on top of the PSR (i.e. to accept the PSR as an axiom.) However, that does not make it’s predictions about the universe valid. For example, we could build up a perfectly self-consistent geometry with non-euclidean axioms and make predictions about the real world based on that geometry. However, the predictions made by that geometry are not automagically accurate just because the system was self-consistent and had some successes elsewhere.
And so we are discussing two different things:
A: The PSR as an axiom
B: The PSR as the way the real world actually behaves
You are correct in saying that it would be wrong to reject A solely on the grounds that human experiences were involved. But we are not talking about A, we are talking about B. This kind of reasoning:
has the PSR making a claim about how the real world actually is. In order to do this, we need empirical evidence about how the real world actually is, and consequently inductive reasoning.
- Assume the universe exists without a cause.
2a. The PSR (or equivalent) says that everything has a cause.
2b. Line 1 violates line 2a.- Therefore the universe must have a cause.