I have a daughter,—have whilst she is mine,— Who, in her duty and obedience, mark, Hath given me this: now gather, and surmise.
There are no more uses of "surmise" in the play.
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He has surmised that this is not a friendly visit.
Colleen Hoover -- Slammed
After texting his mom, he started the truck and peeled out of the parking lot, making it back to the ranch a little after four a.m. Seeing the lights on in the main house, he surmised that his mom had either risen early or. more likely, hadn’t gone to bed.