There is really nothing new in her surmise.
I was in no position to surmise.
Focus your attention more on what you want and less on what your rivals surmise.
It is a highly speculative news report based on surmise and conjectures.
I can only surmise what had happened.
Synonyms for Surmise
guess , speculation , assumption , idea , conjecture , supposition , suspect , estimate , imagine , forecast