Find some program that records key events, and hold down q, w, and a. It's somewhat likely that d will trigger as well (or that only two keys will trigger). Tha

Find some program that records key events, and hold down q, w, and a. It's somewhat likely that d will trigger as well (or that only two keys will trigger). That's ghosting (or jamming) due to only 2-key rollover. It happens because there's not an individual electrical connection for each key. Instead, you have one wire for each row and column, and keys connect between them.