Having the answer key is a double-edged sword. Here is a proven strategy to use the solution manual as a learning tool, not a crutch.
By comparing your attempt to this worked solution, you quickly catch errors—like forgetting that JK flip-flops toggle when J=K=1.
When the sun rose, Leo’s 4-bit processor didn't just work; it hummed. He left the library, leaving the "Black Bible" on the table for the next desperate soul. On the last page of the book, someone had scrawled in pencil: The manual is a map, but you are the driver.