stop normal armour stacking

combat.tex

@@ -458,6 +458,10 @@ Stacked armour can consist of both partial and complete layers, meaning a roll c
 	Of course if this were \textit{partial} plate armour, any roll which gets 3 over the basilisk's \gls{tn} would only get the \gls{dr} of 5.
 }{}
 
+Standard armour cannot be stacked in this way.
+We assume plate, chain, and some leather-based armours already have padded armour underneath.
+Similarly, different types of natural \gls{dr} do not stack, and nobody becomes undead in different ways.
+
 \subsection{Weight}
 \index{Weight}