1.C. Or you could decide that photographic evidence is sufficient to establish factualness.
或者，你可以认定照片作为证据足以确证白宫的真实性。
2.But if it is you experiencing the headache, I can establish its factualness only indirectly.
但是如果是你感到头疼，我只能间接地确证它的真实性。
3.In order to establish the factualness of an event, any number of concrete things need to be appealed to.
为了确定某一事件的真实性，需要求助任何数量的具体事物。
4.That is the most direct and reliable way to establish its factualness.
这是确证白宫真实性的最直接和最可靠的方法。
5.The reason for Buddha's gain is that he can see the factualness in the mundanity very clearly.
佛得到的原因是他对世间的真相看清楚了；