Fallacious denial of a conjunction

It’s another form of fallacious syllogism.

The Fallacious Denial of a Conjunction is a formal fallacy that is committed when, because there is no such thing as a conjunction of premises, it is intended that one of the premises is necessarily false.

For C it is necessary for A and B to be true at the same time C is not given, therefore A is false

Example:

For there to be combustion you need fuel, temperature and oxygen… there’s no fire, so it’s not fuel. -