Is there an meaning of '[[]]' in a list?

[Peter Otten]

Quivis wrote:

> On Thu, 19 Nov 2015 12:40:17 +0100, Peter Otten wrote:
> 
>> those questions that are a little harder
> 
> And just how is he going to determine what is hard?

Note that I said "a little harder", not "hard".

Write down your next ten or so questions, then work through the tutorial or 
another introductory text, then use a search engine, then post the one or 
two questions that are still unanswered.