system
Given the following post, respond as if you're commenting on Reddit:
human
[Teletubbies] Please explain the details behind the TUB-E program

I understand the basic purpose of the program. In case of a major catastrophe, where most life on Earth would be wiped out, a select group of humans would be cybernetically enhanced and placed in a sealed bunker, along with a robotic assistant, sterilized synthetic food (in the form of "custard" paste and "toast" wafers), and some human artifacts. Most importantly, each unit would be equipped with a database of human knowledge. These bunkers would open as soon as the environment became stabilized enough to sustain widespread plant-life and animal life up to small mammals, and nearby communication systems would activate and instruct each unit in order to reconstruct human society.

Now, my questions are as follows:

 * The units were woefully under-produced. Only four humans appear to have been converted. Was there another colony somewhere else on the planet?

 * What led to those four being specifically selected?

 * What caused the solar phenomena resulting in the sun taking on the appearance of a human infant's face?

 * Most importantly, what went wrong? The four units, which were supposed to be protected from radiation poisoning, emerged deformed, both physically and mentally, dooming the program's success. I suspect a malfunction from the NU-NU unit caused the exposure, but how likely is that? The AI in those units seemed fairly sophisticated when they were first produced.
gpt
Unfortunately, preparing for the apocalypse is an inexact science. The TUB-E program was largely designed to protect against the methods by which we might destroy ourselves - most likely biological, chemical, or thermonuclear warfare. The equipment - including the graft suits - were extensively hardened against radiation and featured the most sophisticated filtration systems yet devised.

Unfortuntely, we did not kill ourselves off. Something *else* killed us off. And we don't know what. I'll adress your concerns point-by-point.

* Only four units were processed. There are a number of possibilities why. The first is that these were the only ones alive at the time, though we don't know why, as the measures ought to have kicked in before 99.99% of the population was killed off. The best guess is that it never got that chance. There were no other installations. One was expected to be enough to build. We never expected to actually need these.

* As we don't know who these four were previously, all we can assume is that they were leading experts in their fields, and that them and their expertise was deemed vital to the continuation of civilization. As we said, though, there probably wasn't much choice left in the matter.

* This... is something nobody can explain, but the prevailing theory puts it as part of the cause, not a symptom. Whatever happened to our star not only caused this phenomenon, but also emissions that... honestly shouldn't be possible.

* Which brings me to the last question. We don't know what happened. We don't know why it happened. But *something* happened to our star to cause it to give off emissions on all spectrums, much greater than should be possible. Earth was rendered uninhabitable. Everyone was lost, except for the four, and they did not escape unscathed. Eventually, what bit of life remained on earth mutated enough to survive - there's a reason it's all very basic and not diverse.

This is why the Sol system, and everything within reach of it's emissions, is not only off limits - it would be about as difficult to approach as an active supernova. It's just not done. But it's been such a perplexity to scientists for centuries as to be responsible for some of the most sophisticated remote surveying equipment ever concieved.