A tower which builds itself is absurd, however in the nano world self-assembly is reality. Physicists have investigated how to control the ordering of such self-assembling structures at the nano-scale. Physicists investigated how they can control the ordering of such self-assembling structures and found out how to switch the assembly process on and off. (1)

But what is "self"?

Why do you use that word with no thinking?

Why do we ridicule philosophy in every single sentence we utter?

Think twice.
Every thing you say is important.
Especially the unimportant ones...