In Rio de Janeiro, every cop has to make a choice. He either turns dirty, keeps his mouth shut, or goes to war.

Either you look back and deal with your hypocrisy, or you dismiss it.

We make violent cops, we make violent criminals, and no wonder we have shootouts in slums all of the time.

Measurements, observations, descriptions can only be considered scientific when they are independently confirmed by other people.

If you are in Brazil and you grew up in a right-wing dictatorship, you think Marxism is liberating. But if you grew up in Czechoslovakia, and the Soviet Union is controlling everything and killing people, then you think capitalism is liberating. Neither of those two things are true and it doesn't take a lot brains to understand this.

Science is based on the possibility of objectivity, on the possibility of different people checking out for themselves the observations made by others. Without that possibility, there is no empirical principle capable of deciding between different arguments and theories.