Does the moon exist if there are no sentient beings to look at it?

In my last True/Slant post I explained why it is that quantum effects do not apply to the macro world because of the size difference between sub-atomic particles and (say) chemical reactions inside the neurons in your head, concluding:

During the debate Deepak claimed that the moon is nothing more than a soup of teaming quantum uncertainty. No. Subatomic particles may be altered when they are observed, but the moon is there even if no one looks at it.

Deepak wrote a thoughtful response to this ...