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This is a fairly well known problem for SO (see people trying to explain a question about the ternary operator - a name you only learn after you first try to find out what it is - in any language where it's all symbols).

SO does account for this though. Questions can (and regularly are) closed as 'already answered'. Those questions then link through. This means that all those questions hang around as pointers with all the ways of describing the issue people tried, hopefully increasing the search term surface area.