Pedant

    Sempi: I'm going to have some tea before I get in the shower.

       Me: Hurry up you have 5 mins to finish your tea.

    Sempi: It'll take me more than 5 mins to just make the tea.

       Me: It's already 8 o' clock. I don't think you have time.

    Sempi: Ok. (Checks his watch)

       Me: (realizes he is precise) Technically it is 3 mins to 8. It is only 7:57.

    Sempi: No, it is 2 and a half minutes to 8, not 3.