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deductive arguments 和 inductive arguments 怎么区分?

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deductive arguments 和 inductive arguments 怎么区分?
例如1.Since Christmas is always on a Thursday,it follows that the day after Christmas is always a Friday.
例如2.This chah register drawer contains over 100 coins.Three coins selected at random were found to have dates earlier than 1945.Therefore,probably all of the coins in the drawer have dates earlier than 1945.
帮忙分析上面两个例子,属于哪种类型,为什么?
第一个是deduction,是从普遍现实推出特定的事件(conclusion about particulars follows necessarily from general or universal premises)因为大家都知道圣诞节是星期四,那么圣诞节后面一天必为星期五,但是induction 是指从特定的事件推出普遍结论(inference of a generalized conclusion from particular instances ),因为从100硬币中选3个是特定时间,但是所有的硬币都是1945年之前产的是普遍结论,所以是induction.