[jerclay]

We're not talking about exploit in terms of simply computer science. We're talking about it in terms of allowable gameplay. For example, Robin Walker has stated Natasha is too powerful. Using your strict definitions, either (a) they intend things to be too powerful, or (b) using Natasha is an exploit.

Or © you could be sensible, and realize that not all unintended outcomes (Natasha's power), are an exploit when purposefully used.