In any given key the 3rd interval is a modal scale step. So that means it can be flattened to a minor interval without changing the key. But wouldn't flattening the 3rd make the entire key minor. Because with a major third the 1st triad has the root third and fifth, while with a minor third the 1st triad has the root minor third and fifth?
This doesnt make sense to me.
Bass guitar is the answer to everything