This is no unsolvable problem if we face it wisely and courageously.
There have been unsolved mysteries, but no man may say when a crime is unsolvable.
What perplexity, when we attempt to solve an unsolvable problem!
"So that a man's life is an unsolvable riddle to all but himself," concurred the hakeem.
There still remained the unsolvable problem of what she was to do.
What the dramatist, poet, and novelist would do without the help of the fickle goddess is an unsolvable problem.
All night he pondered schemes of rescue or escape, until his brain reeled and his soul grew sick before the unsolvable problem.
The great extremes of poverty and riches, dwelling in close proximity to each other, were a sad, unsolvable enigma.
We must believe that there is no unsolvable problem before us in considering the presence of the child in the Southern mills.
Abowian, as yet inexperienced in Russian ways, regarded the riddle as unsolvable.