Pushing a button is meaningless until you see proof that the commanded action is actually occurring. Even pushing throttles up is merely a command until you see/feel/hear evidence that thrust is actually increasing. It is not acceptable for a pilot to trust any system unconditionally. Each commanded action must then be monitored to the extent necessary to verify execution, then that the desired result is achieved.
Think of like this: Button pushes are mere rumors until actual results are observed to occur! It's a crying shame that any pilot would actually place their passengers and their own safety in the hands of a mere rumor...
So follow the A/T with the hand if they move, and verify engine acceleration by instrument indications/human senses whether they move or not. Just because one thinks they remember having ordered another scotch doesn't necessarily mean it's been served and consumed. That feeling in the throat will be a better indicator!