Yes, that's why any serious effort in producing software compatible with GPL-ed software requires the team writing code not to look at the original code at all.

Yes, that's why any serious effort in producing software compatible with GPL-ed software requires the team writing code not to look at the original code at all. Usually a person (or small team) reads the original software and produces a spec, then another team implements the spec. This reduces the chance of accidentally copying GPL-ed code.