One can't proceed from the informal to the formal by formal means.
统计学家不能推卸理清科学推断原理的责任,同样,其他任何有思考能力的人也不能逃避类似的义务。
我们对野生动物的爱与对人类之爱有着天壤之别。
Psychological truth is what works in the practical world.