You seem unable to read English. Let me make it clear for you, you're trying to make a lay conversation about population into a math problem which it is not, in doing so you are changing the meaning of lay words into their math definitions and misunderstanding the points being made to you in the same way a scientist means something different by the word theory than a lay person does. Stop talking, stop doing math, and
listen, pay attention to context, this is not a math class and as I'm the commenter you replied to, I'm the one who sets the context and I've said
not a math conversation; this is a lay conversation, use the lay definition of words.
You've been told numerous times to stop thinking about math and read the words but you clearly don't grok or can't remove your math head and have normal conversation. You're still talking about modelling growth, no one else is or was. Turn off your math head and read the English words using their lay definitions, a decline in population is not exponential growth as a decline in population is not any kind of growth because it isn't growth. If you can't bring yourself to admit that, you are beyond hope.
Secondly, I'm a computer programmer, I understand the math, so stop trying to lecture me on math when you're the one not listening. I can't help it you don't understand the point being made to you because you lack the ability to be aware of the context of the conversation you're in. I know what I'm trying to communicate and I've made it as clear as I can numerous ways; if your brain is unable to work in multiple contexts, that's your failing in understanding how to communicate with others.
If you try and prove your point with equations one more time, or reference them one more time, then you've utterly failed to understand what is being communicated to you and we're done because I don't talk to brick walls who can't think.