First four minutes of contact

It is generally believed that the first four minutes of contact decide about whether two people will become friends and will like each other or not.
The recent researches show that first impression is misleading and almost 80% of people admit that they made a mistakes. First impression, first meeting is something like a sample of our pesonality and decide what we think about each other when we're looking at somebody's clothes, apperance or even flat. Sometimes it's that when we see dirty, not well-maintained house we start ti think negative about this person – it's a distracted, lazy, unreliable person. We pass away without any chance to know better each other and we lost a perfect opportunity to meet one very inteligent or reasonable.
It's impossible to judje somebody by the only first impression, for example, when somebody is angry annoying or impolite and have a bad day. After that we have negative opinion about this person and we don't want to be in a acquaintance.