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Consider the following code: In[1]:= l1={3,3,3} Out[1]= {3,3,3} In[2]:= l2={1,2,3} Out[2]= {1,2,3} In[4]:= ForAll[x,MemberQ[l1,x],Exists[y,MemberQ[l2,y],x==y]] Out[4]= True In[3]:=...