回答： the most famous one--that the earth is flat. before Magallanes made a voyage around the world, many people believed that the earth is flat, and if we travel to the edge of the sea, we will fall down from it. However, Magallanes did not think it right and later made the famous voyage. It was Magallanes's suspicion that brought the reality to us. If everyone trusts all the infomation that is given to him, the true fact will never be found and the society will not be improved. the earth is the center of the universe Issac Newton, who founded the classical mechanics, based his theories on the assumption that time flows at the same rate whatever the velocity of the subjects is. However, this was later proved to be wrong when Albert Einstein came up with the Theory of Relativity, which assumps that time is different for subjects of different velocities and finally is proven to be right. Einstein's questioning on Newton's theory expanded human's knowledge about physics and the universe, and contributed to the progress of modern astronomy.

回答： However, though being suspicious with contemporary infomation can help us find the truth and promotes social progress, being too suspicious about everything will bring harm to us. Some theories and infomation have been strictly proven and admitted by most of the experts. Thus it works in most of the cases, thus we can use it to help us with our life and work. For example, the

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