September 13, 2017. Blackboard, RM. 503, Palvito Hall, De La Salle College. The room stinks of coffeestains and incoherence. It is night.
Given that:
x= ʘ,y= ♡,z=(male symbol,female symbol)
ʘ= ,⧲,⧳,⧟,⥉,⥈,⫱,⟟,⟜,⫯,⫰,⧬ ,"R,etc."
Prop. 1:
(x)(y) y∊x≡(∃z)(y∊x⋅z=x)
Prop. 2:
x≍z
x≎z
x≋z
x≣z

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