Three categories of people around the globe

my point of view about the world

According to me there are three types of people are in the world.
first one don't care about anything that others say
second one knows the trick or tips about which is occuring unique but doesn't have
sound knowledge about them
They won't able to answer the question
why is it so? what is the actual thing happening behind them?
Third people who have knowledge about them knows the logic behind them.
These people are nothing but great mathematicians,great management fellows and great scientists
e.g In order to understand this
All we know that sum of a triangle is 180 degrees.
I don't want to talk about the first category because they won't care about anything.
2nd category people know this.But it is not assured that they know the logic.
But the third category people know this why is it so
make that triangle in the form of envelope letter by folding .Now you can notice all the three angles of a
triangle coincide to form angle of a line which is 180 degrees.There are so many ways are there.That also known only to third category people.
So what I want to conclude is that if you think that your effort should be fruitful don't spend your energy in front of first category people who doesn't
have knowledge about what you are saying.
This is not only true in case of maths ,also true in case of Real world.