I agree in general, it is better to inform your readers, your type system and yourself in a few weeks of your intentions. But in simple cases, if your testing o

I agree in general, it is better to inform your readers, your type system and yourself in a few weeks of your intentions. But in simple cases, if your testing out something, it might be better to use lists and cons cells, at least initially(for example plists or alists instead of hash tables). But like a lot of things in common lisp, this requires good judgment.