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Reminds me of the futile arguments late into the night we used to have in our student days- “does what we sense observe really exist? or is this world/universe an illusion?”.

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Reminds me of the futile arguments late into the night we used to have in our student days- “does what we sense observe really exist? or is this world/universe an illusion?”.

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As comment 1 by Paul Higgins clearly implies there are many ways/criteria to demonstrate that the average global temperature is changing. Asking the right questions and finding converging cross correlation of independent sources of observationn is the art of scientific investigation. Of course people have a choice – they can ignore all the lines of evidence that do not fit their world view- or they can try and discredit lines of evidence- but that’s not science. Also science is meaningless unless we derive wisdom from it.

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