Especially in software.

Approach A: implementation is hands-down the fastest.

Approach B: implementation is written so clearly and concisely that it's essentially self-documenting.

Approach C: a lot of attention paid to future proofing the code, parameter checking, sanity checking…

Which of the above was the most "logical" approach that the recipient was just not understanding?

(EDIT: Approach D: adheres closely to coding patterns in the rest of the framework.

I could probably come up with others…)