If a spell caster armed with a wand or staff is within the area of effect of a silence spell can he still use his wand or staff? The DMG seems ambiguous on this point as both these items use the spell trigger activation method which states that a command word must be spoken suggesting that spell trigger activated items can not be used in a silenced area but under activation in the wands section it states that "a character must hold it in hand and point it in the general direction of the target or area" with no mention of a command word which suggests that a wand can indeed be used in a silenced area so which one is it?