(1) If there is light,
(1-1) There is something, we can proof.
(1-2) There is something, we cannot proof.
(2) If there is shade,
(2-1) We can proof (1-2).
(2-2) We cannot proof (1-1).
The above is living sector question, which is famous as one of proofing technics in chemistry and physics.
D: "Confirmed".
Nintendo:
0 件のコメント:
コメントを投稿