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Litmus test may refer to: Litmus test (chemistry), used to determine the acidity of a chemical solution; Litmus test (politics), a question that seeks to find the character of a potential candidate by measuring a single indicator; The Litmus Test, a Radio 4 programme presented by Fred Harris; The Litmus Test, a 2004 album by Cut Chemist
The metaphor of a litmus test has been used in American politics since the mid-twentieth century. [1] During United States presidential election campaigns, litmus tests the nominees might use are more fervently discussed when vacancies for the U.S. Supreme Court appear likely. Advocates for various social ideas or policies often wrangle ...
The No Religious Test Clause of the United States Constitution is a clause within Article VI, Clause 3: "Senators and Representatives before mentioned, and the Members of the several State Legislatures, and all executive and judicial Officers, both of the United States and of the several States, shall be bound by Oath or Affirmation, to support this Constitution; but no religious Test shall ...
Litmus is a water-soluble mixture of different dyes extracted from lichens. It is often absorbed onto filter paper to produce one of the oldest forms of pH indicator, used to test materials for acidity. In an acidic medium, blue litmus paper turns red, while in a basic or alkaline medium, red litmus paper turns blue. In short, it is a dye and ...
The phrase "I know it when I see it" was used in 1964 by United States Supreme Court Justice Potter Stewart to describe his threshold test for obscenity in Jacobellis v. Ohio. [1] [2] In explaining why the material at issue in the case was not obscene under the Roth test, and therefore was protected speech that could not be censored, Stewart wrote:
Some scholars understand the endorsement test as an addition to standards outlined in Lemon, while others view it as a minimal formulation of Lemon, i.e., that while endorsement may not be the only thing that violates the purpose and effects prongs of the Lemon test, it is the first and most important evidence that such a violation has occurred.
Many of these systems evolve in a self-similar fashion in the sense that data obtained from the snapshot at any fixed time is similar to the respective data taken from the snapshot of any earlier or later time. That is, the system is similar to itself at different times. The litmus test of such self-similarity is provided by the dynamic scaling.
In politics, a purity test is a rigid standard on a specific issue by which a politician or other figure is compared. Purity tests are established to ensure that the subject maintains ideological purity with the ideas supported by a particular group, often a political party or one specific faction of a party.