Determine which of Mill’s methods is used in the following example–provide an explanation for…

Determine which of Mill’s methods is used in the following example–provide an explanation for why that method in particular is being used.

It was 104 degrees in Tom’s apartment. He knew that he had been cooking that day and that the radiator in his apartment was set on “high.” He also had taken a hot shower and left his bathroom door open. The next day, Tom did not cook, turned his radiator off and did not take a shower. It was still 81 degrees in his apartment. Tom concluded that the remainder of the excess heat was coming from the apartment below his, because he knew that those neighbors preferred to have their apartment very warm.