An expert is a person who has found out by his own painful experience all the mistakes that one can make in a very narrow field.

An expert is a person who has made all the mistakes that can be made in a very narrow field.

An expert is someone who can tell you exactly how something CAN'T be done

An expert is someone who can tell you exactly how something CAN'T be done.

An expert is disincentivized to promote someone else's disruptive solution, bc if it results in a wholesale change in their field, they go from expert to has-been.

Un experto es una persona que ha cometido todos los errores que se pueden cometer en un determinado campo.

An expert is one who does not have to think. He knows.

An expert is an ordinary man away from home giving advice.

An expert is someone who doesn't want to learn anything new, because then he would not be an expert

Expertise is simply the wisdom that emerges from cellular error. Mistakes aren't things to be discouraged. On the contrary, they should be cultivated and carefully investigated.

الخبير هو شخص ارتكب كل الأخطاء الممكنة في مجال محدد للغاية.

An expert gives an objective view. He gives his own view.

The specialist is one who never makes small mistakes while moving towards the grand fallacy. (p. 154)

The essence of being an independent expert is not only the expertise, which must be a given and is conscientiously assessed by this Council before appointing rapporteurs, but the capacity to carry out the mandate free of intimidation or interference, free of thinking barriers, or of political correctness. An independent expert would fail the mandate and the Council if he or she were to rehash existing wisdoms and engage in rhetoric that only confirms the status quo.The essence of the independent expert is his independence to think outside systems, beyond prejudices, to give impulses, offer new perspectives -- and to make bold proposals to the Human Rights Council.

On the subject of wild mushrooms it is easy to tell who is an expert and who is not: The expert is the one who is still alive.