Theorise

I've seen them theorise. They're willing to jump to conclusions very quickly.

Source: tatoeba (10992929)

I theorise a terrorist breeding ground and terrorize a rigorist network.

Source: tatoeba (12781375)

In Physics of the Impossible, he theorises about how the gadgets that turn up in works by authors from HG Wells to JK Rowling (as well as the cardboard-scenery sci-fi TV of our youth) may become reality.

Source: wiktionary

Beck - who has the sort of rubbery, chucklesome face that should ideally be either a) cast as the goonish sidekick in a bad frat house sex comedy or b) painted on a toilet bowl so you could shit directly on to it - has become famous for crying live on air, indulging in paranoid conspiracy theorising, and labelling Obama a "racist" with "a deep-seated hatred for white people or white culture".

Source: wiktionary