blind alley

I have to go down all these blind alleys first.

Everybody knows that our financial and environmental systems are leading us up a blind alley.

There had to be a way out of this blind alley.

Every new bit of information led into another blind alley.

And if not, it was just another blind alley, of which there were many in police work.

This cannot be a blind alley, no sense to it.

Went down a blind alley and had to back out.

This conversation was the only thing going up a blind alley.

To them it must seem like running away up a blind alley.

This is a blind alley and we must find a different way forward.