What does it mean if, when you try to assemble the pieces, two pieces would have to overlap to form the answer's shape?

If two pieces would have to OVERLAP to form the shape, that answer is INCORRECT — in a valid assembly, pieces fit together WITHOUT overlapping (and without gaps). ASVAB Assembling Objects tests proper fitting. Like a real jigsaw puzzle, each piece occupies its own space; pieces meet at their edges but never overlap or leave gaps. If forming a given answer requires pieces to overlap (or leaves empty gaps), the pieces don't truly fit, so eliminate that choice. Checking for overlaps and gaps is a reliable way to identify wrong answers in puzzle problems.