Term for an argument which cannot be distinguished from sarcasm/jest

What is the word or phrase identifying an argument or statement for which, based on the source, you cannot tell whether the person is being honest or not? The kind of argument or statement where you could think the person actually believes what is being said, when in fact he/she may not.

I know there is a term for this. I just can't remember what it is, and I'm not having any luck Googling for it.

Solution 1:

Alright, I figured it out by searching for "believable facetious argument." I was a little bit off on my definition of it, and it's more of an internet adage than a part of actual English usage. Poe's law is what I was thinking of.

From Wikipedia:

Poe's law is an Internet adage which states that, without a clear indicator of the author's intent, parodies of extreme views will, to some readers, be indistinguishable from sincere expressions of the parodied views.

Thanks for the help though, and upvotes for the effort. :)

Solution 2:

When a speaker employs verbal irony, but there are no detectable indications as to whether or not they actually mean what they say, we might call that speaker "straight-faced" or "deadpan".

"Straight face" is defined by Merriam-Webster as "a face that shows no emotion and especially no amusement".

"Deadpan" is defined by Merriam-Webster as "showing no feeling or emotion".

Solution 3:

"double entendre"

• double entendre - (noun) ambiguity of meaning arising from language that lends itself to more than one interpretation - synonyms: ambiguity, double meaning, innuendo, play on.

e.g. "The song's title is a double entendre."

EDIT: After reading your comment explaining exactly what you're looking for, I suggest "a facetious statement" or "a misleading statement."

• facetious - (adj) Treating serious issues with deliberately inappropriate humor.

• misleading - (adj) giving the wrong idea or impression