To solve a problem or to reach a goal, you don't need to know all the answers in advance. But you must have a clear idea of the problem or the goal you want to reach.
Bio: Joseph Philippe Pierre Yves Elliott Trudeau was a Canadian politician. He was Prime Minister of Canada from April 20, 1968 to June 4, 1979, and again from March 3, 1980 to June 30, 1984. His eldest son is, a teacher and politician.