1.2
The scientific method employs two types of logic — inductive and deductive reasoning.
In inductive reasoning, broad generalizations are inferred from several specific observations.
For example, a scientist might observe that one species of butterfly is attracted to red flowers, but not to similar flowers in yellow color.
From this information, they might conclude that butterfly species prefer red flowers.
However, such conclusions may or may not be true because only a sample of instances is observed and recorded. For instance, in the current example, the scientist did not observe every butterfly or every flower.
So, such generalizations derived from inductive reasoning can be used as a basis to formulate a testable, falsifiable hypothesis.
归纳推理是一种逻辑,其中前提导致结论。归纳推理是不确定的,并且在结论可信的程度上起作用。因此,归纳论点可以是弱的或强的,而不是有效的或无效的,结论可以用来制定可测试的、可证伪的假设。
在归纳推理中,通常用收集到的小样本证据来得出结论。它允许这个结论有可能是错误的。这与演绎推理不同,演绎推理从一个假设开始,着眼于达成一个具体的、合乎逻辑的结论的可能性。
例如,如果观察到池塘中的所有鱼向空中喷水,然后将水喷射到昆虫身上,这样他们能捉到并进食,归纳推理将表明所有鱼必须能够将水喷射出来,作为捕食昆虫的方法。
因为这个结论是可信的,所以它可以用来建立一个可检验的、可证伪的假设,即所有的鱼都会吐水捕食昆虫。一般来说,这是一个薄弱的论点,考虑到并非所有类型的鱼都存在于这个特殊的池塘。然后,为了验证这一假设,研究人员可以从池塘中采集多种鱼类,以及其它食用其它水源昆虫的鱼类,并观察它们在实验室环境中在昆虫面前的行为。研究结果可能会得出结论:并非所有的鱼都向猎物喷水。例如,众所周知,箭鱼用溪水射杀昆虫,而河豚则不然。
The scientific method employs two types of logic — inductive and deductive reasoning.
In inductive reasoning, broad generalizations are inferred from several specific observations.
For example, a scientist might observe that one species of butterfly is attracted to red flowers, but not to similar flowers in yellow color.
From this information, they might conclude that butterfly species prefer red flowers.
However, such conclusions may or may not be true because only a sample of instances is observed and recorded. For instance, in the current example, the scientist did not observe every butterfly or every flower.
So, such generalizations derived from inductive reasoning can be used as a basis to formulate a testable, falsifiable hypothesis.
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