Experts Exchange, basically if stackoverflow was quora. Can only see questions even when logged in and you’d have to pay a pretty penny to get access to any answer. Or you could collect enough points to access the answer you need by writing answers yourself (ridiculously many points, think weeks of answering).

25 Fragen mit 25 Nicht-Antworten (“Ich kann mich nicht erinnern”, der Allwetterklassiker)