[tpeo]

Honestly, I don't think it's such of an issue. If there's a real difference between the kind of information processing that occurs within a cell from that which occurs within the brain, it doesn't really matter what it is called.

Of course, the language within any field matters to the practitioners in that field. Things can be as easy or as hard to understand as the strictness and clarity of the language in that field allows it. But what do I mean is that, if any expression in a field ever fell in to such a degree of obscurity as to be said to have "lost all meaning", whatever it described still might be independently rediscovered later on. So meaning isn't something that needs to be formulated into a categorical imperative, or otherwise we might lose it forever. Striving towards clarity and towards a discriminating usage of words is a practical rule, not a moral one.

Plus, arguing definitions is never a sound choice.