By your logic I'd have to write to Plato for permission to use parts of his work in my last philosophy essay, not to mention Newton, Avagadro, Fermi, Bohr, Laplace, Gauss, Mendel not to mention Joule, Carnot, Watt, Wattson, Crick and a whole host of people who's comments, on and off record I have reproduced in the last few years. By your logic I can't even do this:
As I said before and will continuously do:
"Ask for permissions first before you bring up a cite!!!"
If you cite (not reprint hughe parts) from a written work you don't need the authors permission, but a chat can't count as a written word, but more like a spoken word from person to person and not from an author to the audience.
To put that rough in another way: If you listen to someone in a pub of whom you know he's known by others as well, would you ask for his permission to record his speaking and publish that on the next day news?
Well, in a pub you can't make sure that others listen to what you say, but that doesn't imply that you agree on publishing what you said.
Have a nice day All decision is left to your taste
As I agree with what tye said in this node I don't want to belabor the legal issues here, but I think that your point still needs to be addressed. If I'm understanding you, the subtext of your reply is "how can I get the permission of someone who's dead?". In the cases you site it's relevant to know that copyright protection lasts "for the life of the author plus an additional 70 years." If the copyright is allowed to expire then the work goes into the public domain.
In point of fact the length of protection of copyright
changes over time. And for a good part of the last century
the period has been extending faster than time goes by.
Should this continue then pro-copyright pressure groups
shall truly circumvent the US Constitution's statement that
copyright shall be for limited terms by making the term of
protection "forever minus a day".
An interesting question for the lawyers therefore arises if
you borrow code examples from this site. Legally the
copyright is clear, you need permission to use it in your
own code. But practically...people wouldn't post if they
were going to object to your using it!