Two things:
1. None of those is an "indisputable fact" - at least, not in the context of demonstrating empirical support for the practice of DST.
2. It is mostly an interesting topic of conversation for me. I think I had only 2 clocks that required manually changing. Other than that I maintain that it is a pointless, silly practice, except for the hour I lost last night, I don't lose any sleep over it.
None of those is an "indisputable fact"
I agree with this.
I have seen no proof of indisputable fact.
I had the pleasure this morning of changing the time on several touch screen while they were controlling the level of liquid steel in the Tundish Box.
Took awhile.
Because, well the screens are controlling liquid steel level, duh.
I was a bit apprehensive, because we don't have directions on the procedure.
I just remember being shown it a few years ago.
There is a hidden button on the screen, to keep the operators out.
But I couldn't remember where the button was.
Or, if I had to push it and let go.
Or push and hold for ? seconds.
Or tap ? amount of times.
Fun was had by all.