You have to keep experimenting, and sometimes ideology has to be trumped by practicality.

So I think practicality is one case where it's worth teaching people by hand.

But what that tombstone should have said, in an alternative lifetime, what it should have said if it was your highest expression of talent, was, Here lies the last Nobel Laureate in Physics, who formulated the Grand Unified Field Theory and demonstrated the practicality of warp drive.