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.
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.