[Serious] Please convince me gender is binary

[Abaddon_ire]

Gender, like many other things, is a spectrum. For example, gender is often claimed to be determined by genitalia, however hermaphrodites can have both male and female genitalia to varying extents. So even when it gets to basic physical characteristics, it obviously is not binary.

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Snowflakes as individual snowflakes follow a pattern yes, but each individual snowflake is unique like a fingerprint

That's technically not quite accurate.