NASA has never publicly demonstrated before independent witnesses a spacesuit with ice sublimator cooling system in a high vacuum chamber on Earth duplicating environmental conditions of orbit.
Such has been spoonfed to you, yet you continue to lie about it.
Now it appears they've never tested a spacesuited astronaut while in a vacuum chamber at all except for that last documented test way back in 1966 when the suit failed causing a near fatality.
Another lie. Is there no end to your duplicity?
I'm puzzled more why they won't even show a video of an ice sublimator in a vacuum chamber with the astronaut outside running on the treadmill.
And this would be evidence of what, exactly?
I can tell you what, exactly. You will simply shift your goalposts no matter what to preserve your delusion. First, you demanded pictures, you were given them, then you demanded videos, you were given them, then you demanded text books, you were given them, then you demanded peer reviewed scientific papers, you were given them.
Now, you bizarrely demand
"an ice sublimator in a vacuum chamber with the astronaut outside running on the treadmill." WTF is the intent and purpose of such a pointless thing? Why would anyone in their right mind set up such a pointless "test" of something you cannot identify?
Our space program is currently a mythological faith-based thing. You insist upon it remaining so.
"Our space program"? Really? ESA, Roscosmos, China, India, Pakistan and so forth might be tapping on your shoulder.