It seemed that the obvious explanation for her being here really was the true one.

The obvious explanation is yet another planet, farther out than the ones we know.

And there we have the obvious explanation of our vanishing ground water.

That was the obvious explanation of the silence beneath the trees.

There was a much more obvious explanation, of course, but I wasn't ready to think about it.

There is no obvious explanation why people would want to do this.

The obvious explanation is that women are less flexible in their need for sleep.

But the only obvious explanation seemed to lead straight to paranoia.

Unless, of course, the most obvious explanation was also the correct one and the man had actually believed what he'd said.

"One obvious possible explanation is that they are discriminated against."