TRS:
 {f(g(X)) -> f(X)}
 POP* + Boolean Semantic Labelling:
  Normal positions:
  pi(f_sl=1) = [1], pi(f_sl=0) = [1]
  
Safe positions:
   pi(g_sl=1) = [1], pi(g_sl=0) = [1]
  
Precedence:
   empty
  
Interpretation:
   f^(1):
   0 | 0
   1 | 0
   g^(1):
   0 | 0
   1 | 0
   
  
Labelling:
   f^(1):
   0 | 0
   1 | 0
   g^(1):
   0 | 0
   1 | 0
   
  
Labelled predicative System:
   {f_sl=0(g_sl=0(;X);) -> f_sl=0(X;),
    f_sl=0(g_sl=0(;X);) -> f_sl=0(X;)}
  

  Qed