Actually I don't think in many cases even a guru, let alone a lowly expert, can give a definitive "Yes, that is correct" answer. Most of the questions are pretty open ended and depend a great deal on context, or even on context at a particular moment in time.
I personally believe you may be interested to know that some scientific studies (awarded nothing less than a Ig Nobel prize!) established the so called "Dunning-Kruger effect" by which:
In reply to Re^5: Is it correct?
by blazar
in thread Is it correct?
by GrandFather
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