Surmised

Long before Darwin's theory of evolution, Buffon had surmised that species evolved very slowly under different material circumstances.

The police surmised that the victim told them the truth.

Females feed on squid in the mesopelagic zone, which is below 650 feet, it is surmised to avoid their predators.

He correctly surmised that the waters of the Gulf Stream - a massive current which flows across the Atlantic from the Americas to Europe - was helping to speed the east-bound ships.