The Exception That Proves The Rule

First up, I'm on a podcast about the making of my new film, "Gumdrop", a short horror. Now...

"Exceptio probat regulam in casibus non exceptis." That is: The Exception That Proves The Rule.

I've seen this misused so many times, it's embarrassing. Typically I hear it used to rationalize and justify a thing that is patently incorrect.

SOMETIMES it is used to show that something nearly always one thing can actually be another, typically the opposite, under present constraints or conditions. That is to say, they agree with you that what they are saying is usually wrong, but in this case, as they see it, with how things are, they are correct in their assumptions about it.

How that typically is used however is as a logical fallacy to justify their foolish contentions, because so many get lost in the phrasing.

Or as rational wiki puts it:
"You are most likely to encounter this phrase when somebody is speaking in generalisations or stereotypes and somebody else points out an example that clearly contradicts their comments. Retorting with the platitude that this is just the "exception that proves the rule" is an easy way of handwaving away this inconsistency."

But that all require a sense of understanding where one has a greater sense of reality and extenuating issues we seldom see when applied today, especially as regards politics.

Trump is the exception that proves the rule, that all conservatives are stupid."

I'm not even going to bother disassembling that one. But we do see this frequently among those not as educated or aware as they wish to project they are. Frequently we see this in conservative's arguments in support of ridiculous doctrines, policies, or politicians (see above).

"The exception that proves the rule."

As the grammarist.com puts it:
"A proverb often quoted, but many find confusing. A proverb is a short, common saying or phrase that particularly gives advice or shares a universal truth. We will examine the true meaning of the phrase the exception that proves the rule, its ancient origin, and some examples of its use in sentences.

"...often used to justify something that seems to contradict a rule. However, the term the exception that proves the rule actually means this exception, under these parameters, proves that the rule works in all other circumstances. In this case, the word proves is used in a semi-scientific sense to mean test."

For instance,

If a sign at a bakery states “Doughnuts available Sunday morning”, this is the exception that proves the rule that doughnuts are not available at the bakery at any other time.

This is not how most people seem to use it.

The term, "the exception that proves the rule", is derived from a Latin phrase first used by Cicero, "exceptio probat regulam in casibus non exceptis", which means the exception confirms the rule in cases not excepted.

This is typically beyond the mentality of most who attempt to use this phrase.

Is THAT the exception that proves the rule?