Sentence:  He had <WSD>assumed</WSD> that all these buildings had been divided into apartments , but this one , from a glance at the hall furnishings , was obviously still a functioning town house , and its owners were in residence ; that made it doubtful as the hiding place of a man whose plans had to be made in advance . 
Meaning of the word marked with <WSD> tags:  take to be the case or to be true; accept without verification or proof