BIS 104 PQ 3 ans Spring 2010

BIS 104 PQ 3 ans Spring 2010 - experiments where a single...

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BIS 104 PQ 3 ans Spring 2010 3. Proof of a scientific hypothesis is convincing only if supported by a diverse series of experimental evidence. Your assigned reading, “Rules of Evidence I”, describes three types of evidence: Experiments that establish (1) plausibility, (2 ) necessity , or (3 ) sufficiency. 2a. Define each of these experimental criteria (one sentence for each). (1) Plausibility: Observations or measurements that lead to a correlation in time and space between two events or agents. It is rather weak, suggestive evidence that does not provide direct proof of a relationship. (2) Necessity: This category of evidence is obtained through loss of function type
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Unformatted text preview: experiments where a single suspected causative agent is blocked or inhibited, and its effect on normal activity is determined. (3) Sufficiency: This category of evidence comes from experiments in which the variable of interest is artificially introduced into an experimental system. The system is then monitored to see if there is a gain of function due to the activity or presence of the single variable. 2b. Which of the above 3 criteria provides the weakest type of evidence? Which provides the strongest? Evidence establishing plausibility is the weakest. Evidence establishing sufficiency is the strongest ....
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