The parts of speech of "so" can be slippery. Your classifications seem to be based on the idea that "that isn't so" means "that isn't correct", and "do so" means "do that thing". Other approaches may be available.
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The parts of speech of "so" can be slippery. Your classifications seem to be based on the idea that "that isn't so" means "that isn't correct", and "do so" means "do that thing". Other approaches may be available.
Jigneshbharatiso (adj): You might think the company is changing its policy, but that isn’t so.
I disagree with the adjectival interpretation of "so" in the sentence above.
"so" is the substitute of the content clause (that-clause) in "but that isn't so". In other words, it is used to avoid awkward repetition: You might think the company is chan