You know sometimes when you're in a really bad mood and you're not sure why? That's how I get sometimes.
Mars is telling us something. I'm not sure what it is because It's speaking martian. But it's telling us something
I'm not sure that the current value of the NASDAQ is justified, but I'm not sure that it isn't.
Autumn is really the best of the seasons; and I'm not sure that old age isn't the best part of life.
You know, I'm not sure I ever even had a blind date!
We even make ourselves up, fusing what we are with what we wish into what we must become. I'm not sure why it must be so, but it is.
Well the first thing I'd say is that I'm not sure exactly what I'm supposed to do to show my remorse other than to say that I'm remorseful.
I'm not sure it's possible to stay in Hawaii. It's kind of impractical.
I want one place I can go that is not going to be lewd, and I'm not sure there is anything left.
You think you know me, but I'm not sure that even I know who I am anymore.