Diagrammatic reasoning is like putting together a puzzle, but instead of using physical puzzle pieces, we use pictures and symbols to solve problems. Imagine you have a bunch of pictures of animals, and you need to put them in groups based on what they eat. You might use pictures of plants for herbivores, pictures of other animals for carnivores, and pictures of both plants and animals for omnivores.
Now imagine that instead of animals, you have a bunch of shapes and symbols, and you need to figure out what goes in the empty box based on the shapes around it. You might look at the shape to the left and the symbol above it, and try to figure out what shape and symbol would complete the pattern.
Diagrammatic reasoning helps us think logically and solve problems using visual cues. It's like a puzzle, but with symbols and pictures instead of physical pieces.