Seeing is believing. Ravens are black.
Common sense. All ravens are black.
An old Chinese saying "three (person) makes a tiger". Once an event is verified on numerous accounts, it becomes a fact. For example, 2 different sources of news.
Scientific research. Historical research and data indicate that ravens are black. Until proven otherwise.
Common sense. All ravens are black.
An old Chinese saying "three (person) makes a tiger". Once an event is verified on numerous accounts, it becomes a fact. For example, 2 different sources of news.
Scientific research. Historical research and data indicate that ravens are black. Until proven otherwise.
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