That’s old fashioned rationalization.
Doesn’t necessarily have to be a logical fallacy
Can you elaborate?
I need sour cream for my tacos, and I need tacos.
What where’s the “unnecessary” part?
I probably don’t need tacos specifically…
Sounds like somebody’s never had a tacomergency before.
To be technical about it, you can have tacos without sour cream, too. So I think both are unnecessary (either independently, or for each other) in this case 😂
Ackshually tacos with crema are super tacos.
I think you mean false premise or argument from false premises. “A, therefore B”, even though A is false.
Post rationalization perhaps?
It could also be similar to the logic of phrenology, where they pointed at objective measurements of various features of people’s skulls to make wild conclusions about the superiority or inferiority of different races. It’s not that they were falsifying the measurements, they just skipped a step and treated the sensibilities of the most privileged and influential members of society as objective fact.
Unnn… the whole is greater than the sum of the parts?
Depending on the circumstances, it can be effectively justified. wordle hint
Logical fallacies do not involve themselves in questions of worthiness, usefulness, goodnesss, etc.
If the fallacy relies on this pattern of detecting necessary and unnecessary, then it is not a logical fallacy.
I think they can certainly apply to any situation where the logic is flawed, so arguing that something is necessary since it’s part of another system which itself is unnecessary, is a logical fallacy
If we accept that something is a necessary component of an unnecessary system, but then use that fact to argue that the component is necessary in absolute terms, that’s a logical fallacy given that it’s not absolutely necessary if the system it’s a part of isn’t absolutely necessary
After researching I found it can be called a false necessity fallacy or false requirement fallacy
But the term you’re looking for is tunnel vision.
It refers to committing resources to interpretation of the world around a single immovable assumption.