Don't say in comments what can be clearly stated in code

Reason

Compilers do not read comments. Comments are less precise than code. Comments are not updated as consistently as code.

Example, bad

auto x = m * v1 + vv;   // multiply m with v1 and add the result to vv

Enforcement

Build an AI program that interprets colloquial English text and see if what is said could be better expressed in C++.