Dang sure phrase informal
Totally certain.
I think he's coming. That's for dang sure.
We are dang sure that we will finish the project on time.
I am dang sure everything will be fine.
Meaning absolutely certain or without a doubt
Another way to say "absolutely", "definitely" or "for sure"
That's absolutely right.
With absolute certainty; decisively
You can be absolutely certain that something is true or will occur.
If you fall for someone's trick the first time then they are at fault.
Are you going to mess with me again? Fool me once, shame on you; fool me twice, shame on me.