The obvious place to begin would be to point to the aforementioned satellite images, but then our skeptical interlocutor could reasonably ask if you know how those images were obtained. Unless you are an expert on space engineering and imaging software, you may have some trouble at that point.
显然可以从上面提到的卫星图片开始，但接着我们持怀疑态度的对话者就会理所当然地问我们是否了解图片的出处。除非你是航天工程和图像处理软件的专家，否则你可能感觉很难说清。