Analogy.

Even a stopped clock tells the right time twice a day. So what if you saw this particular clock during one of those two times and assume that its a working clock? Particularly nasty, if you trust the clock to show you the right time sometime later, isn't it? Possible, but not probable. Well again I wonder isn't that happen most of the times, in a relationship? You actually meet a person in similar circumstances as one of those two times when the clock is showing the right time, only difference being that here we allow a lot more tolerance than we would rather for a clock. Funny how things are.