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Metamath Proof Explorer

Theorem altru

Description: For all sets, T. is true. (Contributed by Anthony Hart, 13-Sep-2011)

Ref Expression
Assertion altru 
|- A. x T.

Proof

Step Hyp Ref Expression
1 tru 
 |-  T.
2 1 ax-gen 
 |-  A. x T.