Nuprl Definition : poss-le 0,22

e1  e2 == 1of(e1) = 1of(e2) & 1of(2of(e1))  1of(2of(e2))  
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clarification:

poss-le{i:l}(e1e2) == 1of(e1) = 1of(e2 ES{i} & es-le(1of(e1);1of(2of(e1));1of(2of(e2))) 
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DefinitionsA & B, s = t, ES, e  e' , 1of(t), 2of(t)
FDL editor aliasesposs-le

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