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2 votes
2 answers
98 views

Does Artistole's principle of non-contradiction imply/concede/allow there are contradictions, we just can't learn much via them?

From Graham Priest and the SEP it seems like the world doesn't have to be a certain way with the PNC being necessary for "scientific inquiry, reasoning and communication" (SEP). The world ...
J Kusin's user avatar
  • 3,523
1 vote
3 answers
199 views

Why law of identity is formulated in terms of "things" and not statements?

The law of non-contradiction (LNC) and law of excluded middle (LEM) are both formulated in terms of statements. That is "A and not A" is always false and "A or not A" is always ...
Antonios Sarikas's user avatar
4 votes
3 answers
1k views

How do Thomists prove that: "Everything that exists must exist by something."?

One variation of principle of sufficient reason that Thomists use is: Everything that exists must exist by something. How do they prove such a statement? In particular, why can not something just ...
Thom's user avatar
  • 288