For example, I do not infer that the above definition of depreciation contains two definitions. Rather, I read the semicolon to indicate the second portion of the sentence expands upon the first portion of the sentence,
At the risk of engaging in non circular productive argument, that is a distinction without a difference. Whether we recognize your quoted passage as two conflicting and different definitions, or we “infer” them to be one ambiguous definition that can be manipulated, the bottom lines don’t change.
What happened now, is a second layer of confused theory is obfuscating the first.
I think it would be obvious to anyone that defintion 1, loss in value (V2 – V1), is not the same as defintion 2, a loss in cost (C - V1). Remember the environment controlled by a principle that says C is not V. So calculations based on C (losses to cost) should not be referred to as calculations based on V (loss of value) - nor should they be expected to produce the same results. To make a pet analogy, the "inference" is like a guy who thinks he lost his cat, but reports that he lost his dog (because he “infers” some ambiguity in the definition of mammal). Whereas my point is that any reasonable person would see that Pet Theory doesn’t make any sense.
What I don’t want to lose track of, is that this secondary layer of confusion is obfuscating the original layer. Let me give you an example similar to one used another forum where I was roasted with various personal innuendos by the same type of person who would impugn the pedigree of your SRA. The example was based on a neighborhood of $500k to $600k houses. A person is spending $1 mil to overbuild a super adequate house that will be worth $800k when finished, and is worth $800k when finished.
- Using definitions 1 (V2-V1) – “a loss in property value from any cause” – “the” depreciation is zero.
- Using definition 2 (C-V1) - “the” depreciation is $200k.
- Using your “inference” V2 in definition 1 really means C, so “the” depreciation is $200k
I was roasted for asking what loss in value. The house is worth $800k, and it is brand new, and it was never worth anything else.
So, this secondary layer of confusion
- whether “loss of value” is zero as I contend or whether the loss of value is $200k under what I believe is secondary nonsense theory that confuses cost with value -
is obfuscating the original confusion, which was based on the idea that there is no “loss” but a gain of value. That is, the overbuilt and super adequate one is worth more. In the example the overbuilt one is worth $200k-$300k gain in value over the neighborhood norm.
Do you see what I am getting at? You started out agreeing with me that there would be a increase in value, and ended up defending certain books that say there would be a loss in value.

And from that, you infer that I am the one going in circles.
And remember the context, your argument that people who make enough errors should be retested. That's what makes my antenna go up. In this environment, how do you define error - getting the nonsense theory right and the value wrong, getting the value right and ignoring the nonsense theory? I think damage is done forcing someone to memorize and regurgitate nonsense, and that no damage is cured making them do it twice.