Nope, appeal to obviousness is not a sound argument. There are many things people thought were obvious that were wrong.
It wasn't an argument. There isn't much point in going to a lot of trouble to make an argument to someone so clearly determined to ignore the truth. It is nevertheless true.
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It wasn't an argument. There isn't much point in going to a lot of trouble to make an argument to someone so clearly determined to ignore the truth. It is nevertheless true.