An instruction says, “Remove the name from the list,” without identifying which list. The reader may not invent arbitrary names, dates, or lists. A different issue arises when an unexpressed element must be understood for a legal or rational statement to hold properly; this is the domain of iqtidah al-nass.
The test is necessity: would the intended utterance fail without supplying the omitted element? A convenient embellishment, where the utterance already works as stated, is not iqtidah.