Sentence examples for even tougher problem from inspiring English sources

It's all made up, it doesn't exist, algebraic melodrama .Three new books grapple with what is arguably an even tougher problem: the Riemann hypothesis, a puzzle that has perplexed mathematicians for the last century and a half.Riemann's hypothesis is just 15 words: "The non-trivial zeros of the Riemann zeta function have real part equal to 1/2".

In so many ways, he taught us how to live life to the fullest, to take joy in the accomplishments of others, to face the challenges of work and life with an indomitable spirit, and to look even the toughest problem straight in the eye and face it with courage and confidence.

Climate change makes the problem even tougher.

The triple parity problem is even tougher.

This makes the dominance of mega-bucks in future elections -- the root of all the other problems -- even tougher to transcend.

Solving these problems will in turn demand a high degree of co-operation between people who do not always get on: companies and NGOs, designers and emerging-world governments.However, the exciting thing about the emerging world at the moment is a prevailing belief that even the toughest problems can be solved.

Newsom said he was "a different kind of leader" who "isn't afraid to solve even the toughest problems".

The issue of inter-generational empathy on climate risk butts up against even tougher barriers, the ones that make this a truly "super wicked" problem.

Yet, beyond the rationalizations lie some disturbing problems for the Giants to address this week as they prepared for an arguably even tougher opponent.

"People in some quake-stricken areas even face the tough problem of provisions for this winter and the coming spring".

Informally, he was even tougher.