Page:Mind (New Series) Volume 9.djvu/318

 304 G. E. MOORE : NECESSITY. And in maintaining that it is so, we shall only differ from Hume in that whereas he said ' A thing is an effect when we do infer its existence from the existence of another thing," meaning only that our belief in the latter causes us to believe in the former, we shall have to say ' A thing is an effect, when its existence may be validly inferred from the existence of another thing, whether we make the inference or not '.