reject something out of hand
dismiss something out of hand

But it is not an idea to be rejected out of hand.

There are too many good things in this book for it to be rejected out of hand.

It is one thing that I have rejected out of hand.

For the first time ever, she did not reject it out of hand but sat silent, thinking.

I want to know why you reject that out of hand.

Up until that moment he had thought the king was not listening, and would reject the whole idea out of hand.

He rejected the idea out of hand, and was correct, but for the wrong reason.

The king might not reject such a proposal out of hand.

But opposition groups rejected the Government's approach out of hand.

But he wasn't about to reject it out of hand.