(5) Semantical fallaciousness results from the ambiguity of terms; the conclusion will follow if the sense given to the term in the premises makes the premises false, but if the other sense is ascribed to the term, making the premises true, the conclusion does not follow (it becomes an instance of formal fallaciousness).
That the advert is actually real, placed in the September 1997 issue of US survivalist magazine Backwards Home, makes the premise all the more delicious.
Interviews with the original disco DJ Nicky Siano and historian Alice Echols make the premise more believable as well, even if Echols's theories border on the surreal.
The rider, however, makes the premise hypothetical, and that, in turn, changes the rules as far as conversion is concerned, and does not allow the conclusion Ibn Kammuna wishes to draw.
So I turned to Google, entered a search for "flight attendants," and came up with a few hits that made the premise seem questionable.
Whether such a unified vision could succeed today is questionable; the distrust of government that haunts newer generations makes the premise of artists working not against, but for the military seem unlikely.
He also asked the auctioneers to "refer the sellers to the appropriate authorities for withholding essential information of penal ground rent provisions that make the premises worthless".
The feature of (3) that guarantees that every instance of it will be valid is its construction in such a manner that every uniform way of replacing its variables to make the premises true automatically makes the conclusion true also, or, in other words, that no instance of it can have true premises but a false conclusion.
If we try to retain the interesting conclusion, but make the premises all true, the argument will lose its soundness.
