Everything is weird if you deconstruct it this much. This comes across very much like an “I’m 14 and this is deep” type post.

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I’ve always seen it as a contract-like promise that you’re telling the truth. So if you weren’t, you can be charged with perjury, which used to come with much more severe punishments.

Much like the odd statements on visa forms where you promise you aren’t a terrorist or have committed genocide.