for S being non empty non void ManySortedSign
for X being V5() ManySortedSet of the carrier of S
for T being b₂,b₁ -terms all_vars_including inheriting_operations free_in_itself MSAlgebra over S holds T height<= 0 = { (x -term) where s is SortSymbol of S, x is Element of X . s : verum } \/ { (o -term p) where o is OperSymbol of S, p is Element of Args (o,(Free (S,X))) : ( o -term p in T & the_arity_of o = {} ) }