Unfortunately, it doesn’t “debunk” it. Musk has had too many questionable or misleading tweets over time that have gotten him in trouble, including jeopardizing his board seat (stepping down as chairman in 2018) and CEO position, for me to take his tweets as 100% fact.
The "math announced" doesn't confirm anything either since there are no details as to the breakdown of the models (trim, colors, options, etc.), the allocation of cars by countries, when the deal was closed/finalized, etc.
The specs from Hertz only confirm what is available in their current fleet, not what may be included or available as part of the 100k order.
Nothing...nada...zip...zilch...zero...can be debunked regarding potential "discounts" with the limited and vague information that has been provided thus far. Given that, there's no point in continuing to go back and forth on this.