Gibson's law
Encyclopedia
In public relations
Public relations
Public relations is the actions of a corporation, store, government, individual, etc., in promoting goodwill between itself and the public, the community, employees, customers, etc....

,
and in the practice of law
Practice of law
In its most general sense, the practice of law involves giving legal advice to clients, drafting legal documents for clients, and representing clients in legal negotiations and court proceedings such as lawsuits, and is applied to the professional services of a lawyer or attorney at law, barrister,...

, Gibson's law holds that "For every PhD there is an equal and opposite PhD."
The term specifically refers to the conflict between testimony of expert witness
Expert witness
An expert witness, professional witness or judicial expert is a witness, who by virtue of education, training, skill, or experience, is believed to have expertise and specialised knowledge in a particular subject beyond that of the average person, sufficient that others may officially and legally...

es called by opposing parties in a trial
Trial (law)
In law, a trial is when parties to a dispute come together to present information in a tribunal, a formal setting with the authority to adjudicate claims or disputes. One form of tribunal is a court...

 under an adversarial system
Adversarial system
The adversarial system is a legal system where two advocates represent their parties' positions before an impartial person or group of people, usually a jury or judge, who attempt to determine the truth of the case...

 of justice
Justice
Justice is a concept of moral rightness based on ethics, rationality, law, natural law, religion, or equity, along with the punishment of the breach of said ethics; justice is the act of being just and/or fair.-Concept of justice:...

.
It is also applied to conflicting scientific opinion injected into policy
Policy
A policy is typically described as a principle or rule to guide decisions and achieve rational outcome. The term is not normally used to denote what is actually done, this is normally referred to as either procedure or protocol...

 decisions by interested parties creating a controversy to promote their interests.

See also

  • Clarke's three laws
    Clarke's three laws
    Clarke's Three Laws are three "laws" of prediction formulated by the British writer and scientist Arthur C. Clarke. They are:# When a distinguished but elderly scientist states that something is possible, he is almost certainly right...

    , including Clarke's fourth law: "For every expert there is an equal and opposite expert."
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