Sentence examples for cannot know for from inspiring English sources

I cannot know for sure.

One simply cannot know for sure, it says.

The victims cannot know for certain who tortured them.

We cannot know for sure, and Woods, perhaps wisely, does not guess.

The problem is that you cannot know for sure what you're going to get.

But they say that they cannot know for sure unless they know how the logger works.

I cannot know for sure, of course, but I sense that Clifford Geertz would agree with me.

We cannot know, for example, what would happen if the government raised taxes to cut the deficit.

What we cannot know for sure is the fate of the many informants, dissidents, activists and bystanders quoted in the American cables.

Even those who negotiate directly with him cannot know for sure if he is expressing his views or those of the board.

And the rest of us cannot know for certain that Madrid would not have snatched victory from defeat, regardless of the red card.