I think the difference is people use those as citations for specific facts, not to logically analyze your code. If you're asked how technical detail of C++ work

I think the difference is people use those as citations for specific facts, not to logically analyze your code. If you're asked how technical detail of C++ works then simply citing Google is acceptable. If you're asked about broader details that depend on certain technicalities specific to your codebase, Googling would be silly.