Paradox or Riddle. Brain-training exercises.

What was the name of the first person to visit the Sun?

By the way, maybe the captain really did visit the Sun :)

A condemned man was thrown into prison on Saturday with the following words:
— You will be hanged at noon on one of the seven days of the next week, — said the judge, — but on which day, you will only find out in the morning on the day of the execution.

And this is interesting. That is, "finding out about the execution" in the context of the problem does not necessarily mean that it will be announced to you. It means that you will be able to conclude that you will be executed.
And the mistake was that Putin introduced a new day of the week, "Putelnik," and he was executed on the morning of Putelnik, and he didn't know in advance that such a day of the week existed.