Word for making an assertion without knowledge of its truth? [closed]

As opposed to lying which is to assert a false statement knowing that it is untrue, with the intent to deceive.

Is there a related word for making a statement as if it were true, with the intent to deceive, except the individual is actually unaware of its truth value?

ADDED

Contextual example:

Alice: This news presenter looks under-dressed.

Bob: No he doesn't, they probably don't get to choose what they wear anyway, so even if he did, its not his fault.

Alice: They do get to choose what they wear.

Bob: You don't know that, you're word/phrase here.

Alice does not know, but in the strict sense of the term, she is not lying because she does not know the real truth value of her statement. She wants to 'win' this exchange by asserting a statement whose truth she is ignorant of.

You might want to consider the word "conjecture" which means an opinion or idea formed without proof or sufficient evidence

Also consider "speculate" which similar in definition but has to do more with guessing.

On the Wikipedia page on lying, the two terms that come closest are to bullshit and to fabricate:

Bullshit does not necessarily have to be a complete fabrication. While a lie is related by a speaker who believes what is said is false, bullshit is offered by a speaker who does not care whether what is said is true because the speaker is more concerned with giving the hearer some impression. Thus bullshit may be either true or false, but demonstrates a lack of concern for the truth which is likely to lead to falsehoods.

A fabrication is a lie told when someone submits a statement as truth, without knowing for certain whether or not it actually is true.[citation needed] Although the statement may be possible or plausible, it is not based on fact. Rather, it is something made up, or it is a misrepresentation of the truth. Examples of fabrication: A person giving directions to a tourist when the person doesn't actually know the directions. Often propaganda is fabrication.

The Wikipedia page on bullshit refers to an excerpt of an essay by philosopher Harry Frankfurt, who draws a distinction between a liar and a bullshitter:

The liar, Frankfurt holds, knows and cares about the truth, but deliberately sets out to mislead instead of telling the truth. The "bullshitter", on the other hand, does not care about the truth and is only seeking to impress

Those looking for a term less vulgar than bullshit might consider some of the possible synonyms for fabricate, making Alice's statement a contrivance, concoction, or simply, a fabrication.