1. To let a computer program do a meaningful calculation.
2. To depict only by using numerical value appeared in a calculation process.
3. However, do not represent a caluculation object as object itself.
By a numerical formula of “1+1”, a calculator is not concerned with whether or not it depicts counting apples (or human beings).
For instance, a physical engine simulates Newtonian mechanics, such as “mass”, “force”, “velocity” and a “position”. These things, however, are simply limited quantity in principle, so that a computer doesn’t think about what the calculation does mean.
The world which human beings regard without suspicion is not the world itself. Is it possible for human beings to deal with principles and natural law underlying the world which natural science have been aiming to succeed in solving ?