bis_104_pq_1a_ans_spring_08 - provide direct proof of a...

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BIS 104 PQ 1a ans fall 07 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
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Unformatted text preview: provide direct proof of a relationship. (2) Necessity: This category of evidence is obtained through loss of function type 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....
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