Step 1: Reconstruct both scenes. Identify the subject and comparison image, their elements, positions and relations. Where the text omits an element, determine its role from context rather than inventing a new scene.
Step 2: Find indispensable features. Ask which attributes, movements or intellectual relations cannot be removed without changing the comparison’s central effect. Those belong to the point.
Step 3: Classify accurately. Decide whether the point is single, composite or multiple, and whether it is sensory or intellectual. Then classify the terms separately as single or compound if relevant.
Thus physical books and carriers may ground an intellectual composite, while dust and stars ground a sensory configuration.