The bottom line is that time travel is allowed by the laws of physics.

I'd say many features of string theory don't mesh with what we observe in everyday life.

I believe we owe our young an education that captures the exhilarating drama of science.

I believe the process of going from confusion to understanding is a precious, even emotional, experience that can be the foundation of self-confidence.

The melded nature of space and time is intimately woven with properties of light speed. The inviolable nature of the speed of light is actually, in Einstein's hands, talking about the inviolable nature of cause and effect.

In quantum mechanics there is A causing B. The equations do not stand outside that usual paradigm of physics. The real issue is that the kinds of things you predict in quantum mechanics are different from the kinds of things you predict using general relativity. Quantum mechanics, that big, new, spectacular remarkable idea is that you only predict probabilities, the likelihood of one outcome or another. That's the new idea.

My emotional investment is in finding truth. If string theory is wrong, I'd like to have known that yesterday. But if we can show it today or tomorrow, fantastic.