This is probably why it's important to not anthropomorphize your code. Code abstractions do pretty much one thing: they prevent the duplication of code. They each do this in their own ways that make certain deduplications easier than others. If you focus on that, the broken analogy of taxonomy doesn't matter, and you can easily hop between the religious war camps of "OOP vs FP" and "Inheritance vs Composition". Figure out what you want your ergonomics to be and just go with that.