Direct Proofs: Beginner Examples (Even/Odd)

Let's prove some basic statements using the direct proof method! This is intended for beginners to direct proof or proof in general.
Timestamps:
0:00 Introduction
00:50 Definitions
3:31 Example 1
8:14 Example 2
12:18 Example 3
15:53 Example 4
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[@garthgriffith4237]

Very good video

[@BrainGainzOfficial]

Sorry for the audio being rough at moments and the video lagging behind the audio, especially in the last example. I'm still tinkering with my audio/video settings to get this type of video format down. I'm also entertaining the idea of buying a green screen and including myself in the video. I'm open to any feedback or suggestions!