What is considered a fact in one context can be totally untrue in another context. Six and Nine may have the same shape, but depending on the environment in which they appear, people may interpret them differently. A cylinder may cast a circular or rectangular shadow in certain orientations, but deciding what the shape is based on one of those two shadows would miss the mark completely. ,
The same goes for language: a word may mean many different things, and we need to know which language it came from, and which sentence it is used in to decide on its meaning. And while it may be called a fact that relatively large percentages of black people get caught for various crimes, such a statistic is severly skewed by many other causes, like the fact that colored people are more frequently stopped by police. Nowadays, generalisations are more dangerous than ever, because reality is far more complex than ever.