These may in fact sound like rather subtle questions to ask a pig, but they are well within the scope of modern animal psychology.

It was also a matter on which Conan could think of no questions subtle enough to be safe.

Nor did she miss the subtle question that lay under his words.

A final question, subtler and more interesting, is what role these historical materials should play in our understanding of the Constitution.

Not even a caress really, more a subtle question, a suggestion.

Over time, they can answer more subtle questions about the nature of make-believe.

At issue is the subtle question of what counts as evidence.

I let him talk, waiting for the opportunity to insinuate a subtle but significant question.

But these options, which did not exist in commercial aircraft just a few years ago, are raising hard and particularly subtle questions.

Whether to play a ko threat, and if so, which one, can be very subtle questions.