Sentence examples for hardest problem from inspiring English sources

Sanctions is by far the hardest problem.

What's the hardest problem you've had to troubleshoot or solve?

I'll ask them, "What's the hardest problem you've ever solved?

Tone was the single hardest problem I had to solve.

The hardest problem of consciousness is knowing what's on another creature's mind.

That's because it was meant to be the hardest problem on that test.

Our department takes on the hardest problems.

This is one of the hardest problems confronting AI.

That's his hard problem.

It's a harder problem.

"It is a very hard problem".