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Correction to what I say at 58 seconds: The "third estate" was not just the bourgeoisie but also included the lower class, sometimes called the proletariat.

Correction to what I say at 6 mins 23 seconds: The "rest" should have been "remainder". Sorry about that.

In this video I explain that how to quantities are added depends on what the properties of those quantities are. There are different addition laws and 2 + 2 does not always equal 4.

0:00 Intro
0:19 2+2=5 as a falsehood
1:58 Different ways to add
7:56 Summary
8:30 Sponsor message