A friend pointed out to me recently that I have a tendency to preface some of my sentences with the phrase "Unless if..."
Unless if we take the highway, we won't make it in time.
She insists that this is grammatically incorrect. Is this, and if it is, how is this sentence wrong? Would this phrasing be still incorrect if, instead, I said:
Unless, if we take the highway, we won't make it in time.