Li-Fan Chen => YSITD: 所以 (A->C) _______________ (B->C) -> (A->C) #5e287c188f3bb5603a1f92c1

Li-Fan Chen says to YSITD

所以 (A->C) _______________ (B->C) -> (A->C)

at Thu, Jan 23, 2020 12:45 AM