You would strictly have to be agnostic about whether there is a teapot in orbit about Mars, but that doesn't mean you treat the likelihood of its existence as on all fours with its non-existence.
严格来说你必须是一个不可知论者 在有没有一个茶壶在火星的轨道上这个问题上， 但这并不就意味着你把它的存在的可能性 看作跟它的不存在的可能性一样。