The root of this “like versus as” controversy is that traditionally like is a preposition and as is a conjunction. Nevertheless, people have been using like as if it were a conjunction (as I did) for at least 100 years, and grammarians have been raging against that use for just as long. In fact, the Harper Dictionary of Contemporary Usage states that “probably no single question of usage has created greater controversy in recent years” than the conjunctive use of like. See More . . .