Definition (确定性)
To have knowledge of something or state something without any doubt.
确定知道；确定说出
I cannot say for certain whether he will accept the job offer.
我无法确定他是否会接受这份工作邀请。
We don't know for certain how this new policy will affect our business.
我们无法确定这项新政策将如何影响我们的业务。
She knew for certain that she had made the right decision.
她确信自己做出了正确的决定。