is it possible one function Return true if its argument is one    
   variable or one Symbol I don't know    
    exactly    
   Else return false    
      
    something    
   p(x:Any):Boolean==(Symbol?(x)=>true;false)    
      
   One function of conversion    
   g(x)==x::ROMAN    
      
   One rule that convert only some leaf 🠠 
   � of expression    
      
   f:= rule    
      (%x|p(%x))==g(%x)   
      
   --------   
   Or something as   
   g(x)==covertifCan(x, ROMAN)   
      
   f:= rule   
        %x==g(%x)   
      
   Where g(x) convert x to ROMAN type   
   if it can, if not can return the same x   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)