This is sammari - an abridged version of Critical Thinking, Logic and Problem Solving. How to think effectively, avoiding logical errors, and find impeccable solutions for any problem" Bigrocks Thinking. Only the most valuable thoughts, ideas, cases, examples. You can't envy our distant ancestors. Every day they were in danger: hunger, cold, wild animals, rockfalls and lightning. Survived the strongest, hardy and... emotional. In contrast, strong uncontrollable emotions harm modern people. We have to cope with a huge flow of information, competition and stress - and it is advisable not to lose your temper. Today, those who have developed critical thinking, who are able to effectively solve problems and substantiate their point of view, win.