How to use "determine" in a sentence

She intended to determine if the words about Danny had been previously programmed to print out on her machine or if they had been sent to her just seconds ago by someone at another computer in another office in the hotel's elaborately networked series of workstations.

Unfortunately, George Alexander, chief of the Nevada bureau of the Network, hadn't possessed the patience or the skill to determine the woman's true motives

"As far as we can determine, it's not a tumor