Uploaded February 2021 | Updated September 2026, 8 hours ago

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This video is about what makes a valid argument a good one. First, we discuss why a valid argument can be a bad argument. Then, we discuss three ways an argument can be good: it has true premises (so it is sound), it has premises that are rational to believe (so it is strong), and it has premises that are known to be true. We talk about limitations of each kind of argument.

I recommend reviewing the material from this video first: youtu.be/yGECoBlGHs8

Here is a video about knowledge: youtu.be/HI_q7RUjQ6I

0:00 intro (why validity isn’t enough)
1:44 step 2 of argument evaluation
3:30 sound arguments (valid with true premises)
6:35 strong arguments (valid with premises that are reasonable to believe)
14:49 known arguments (valid with premises that are known to be true)
20:10 summary

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