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  2. Necessity and sufficiency - Wikipedia

    en.wikipedia.org/wiki/Necessity_and_sufficiency

    If the U.S. Congress passes a bill, the president's signing of the bill is sufficient to make it law. Note that the case whereby the president did not sign the bill, e.g. through exercising a presidential veto, does not mean that the bill has not become a law (for example, it could still have become a law through a congressional override ...

  3. The FDA doesn't test dietary supplements before they hit the ...

    www.aol.com/fda-doesnt-test-dietary-supplements...

    The FDA doesn't test dietary supplements before they hit the shelves. Here's what you need to know. Cassidy Grom. March 28, 2024 at 12:00 PM. Canva. ... Drugs vs. dietary supplements.

  4. Correlation does not imply causation - Wikipedia

    en.wikipedia.org/wiki/Correlation_does_not_imply...

    Causality is not necessarily one-way; [dubious – discuss] in a predator-prey relationship, predator numbers affect prey numbers, but prey numbers, i.e. food supply, also affect predator numbers. Another well-known example is that cyclists have a lower Body Mass Index than people who do not cycle.

  5. Proving a negative - Wikipedia

    en.wikipedia.org/wiki/Proving_a_negative

    Proving a negative or negative proof may refer to: . Proving a negative, in the philosophic burden of proof; Evidence of absence in general, such as evidence that there is no milk in a certain bowl

  6. Evidence of absence - Wikipedia

    en.wikipedia.org/wiki/Evidence_of_absence

    In carefully designed scientific experiments, null results can be interpreted as evidence of absence. [7] Whether the scientific community will accept a null result as evidence of absence depends on many factors, including the detection power of the applied methods, the confidence of the inference, as well as confirmation bias within the community.

  7. The symptoms of influenza A and B can be identical, experts ...

    www.aol.com/news/symptoms-influenza-b-identical...

    But, if you're comparing flu A vs. flu B, it's impossible to tell which strain you have based just on your symptoms. "They're clinically indistinguishable on a case-by-case basis," Ray says.

  8. Type I and type II errors - Wikipedia

    en.wikipedia.org/wiki/Type_I_and_type_II_errors

    If a test has a false positive rate of one in ten thousand, but only one in a million samples (or people) is a true positive, most of the positives detected by that test will be false. The probability that an observed positive result is a false positive may be calculated using Bayes' theorem .

  9. Do-support - Wikipedia

    en.wikipedia.org/wiki/Do-support

    I did not try to laugh. vs. I tried not to laugh. They do not want to go. vs. They want not to go. There are two predicates in each of the verb chains in the sentences. Do-support is needed when the higher of the two is negated; it is not needed to negate the lower nonfinite predicate. For negated questions, see the questions section above.