Gordon_R
Honorary Master
https://en.wikipedia.org/wiki/Identity_of_indiscernibles
What is being argued is that because there is no way to distinguish between natural or artificial CO2, it is not reasonable to conclude that the system treats natural and artificial CO2 differently.
LOL, that link leads to the most amusing description I have read on Wikipedia. I'm not sure exactly how this applies to global warming, but it does refer to the level of discussion on this thread:
Numerous counterexamples are given to debunk Descartes' reasoning via reductio ad absurdum, such as the following argument based on a secret identity:
Any of which will undermine Descartes' argument.
- Entities x and y are identical if and only if any predicate possessed by x is also possessed by y and vice versa.
- Clark Kent is Superman's secret identity; that is, they're the same person (identical) but people don't know this fact.
- Lois Lane thinks that Clark Kent cannot fly.
- Lois Lane thinks that Superman can fly.
- Therefore Superman has a property that Clark Kent does not have, namely that Lois Lane thinks that he can fly.
- Therefore, Superman is not identical to Clark Kent.
- Since in proposition 6 we come to a contradiction with proposition 2, we conclude that at least one of the premises is wrong. Either:
- Leibniz's law is wrong; or
- A person's knowledge about x is not a predicate of x; or
- The application of Leibniz's law is erroneous; the law is only applicable in cases of monadic, not polyadic, properties; or
- What people think about are not the actual objects themselves; or
- A person is capable of holding conflicting beliefs.