I'm new to WordPress Development but I've programmed in PHP for a couple of years.
My understanding is that the Codex pages are as close to authoritative information on WordPress that you're going to get and that it is the place to look to when you want to learn WordPress development.
Some information is good but take for instance this section "Boolean Template Tags" on the introductory page about template tags: https://codex.wordpress.org/Stepping_Into_Template_Tags#Boolean_Template_Tags
The documentation writer claims that a string passed into the wp_list_cats function can have multiple values if they are 'connected together with boolean math techniques'. That's bogus, && is logical AND syntax in most programming languages and & is bitwise but it doesn't have anything to do with the string right, it's just for parsing purposes and is identical to a query string.
For me it's not a biggie because I know better but thousands of beginners are mislead and presented with more complex information than need be.
Are there no editors that have to check information before it gets posted?