As more states and districts teach computer science, there's a debate over whether coding or theory should dominate.

That is, we can never prove a theory; we can only disconfirm or falsify through observation and experimentation. Science can never be settled, and it is never just consensus.

What holds all of this together -- the inward tug of gravity in this analogy -- is consensus. We often call it "theory," but that's just a different word for consensus. Every scientific field has a ...