He won't say no to me. That would cross the line and directly put his job at risk. Instead, he'll complain about it, make sarcastic remarks, argue that a trivial side task is more important than the assigned task and so the assigned task has to wait, and watch anime on his computer and click away from it to hide it when I walk by or come to visit him. He'll skirt the line to avoid hard proof to the manager that he is doing something wrong.
I tried that early on when I was a new project lead and asking politely didn't work for him as it does for others. When I get direct and authoritative, he gets passive aggressive and depressed and mopes around and co-workers make fun of him behind his back. He starts saying self-deprecating things, gets all moody, and it's kind of sad to watch. We had a giant struggle about a part with a deadline and he eventually did it weeks late with a variety of excuses as to why it wasn't being done after I repeatedly told him to do it.
Our manager is the very embodiment of the
Peter Principle. He was a ridiculously good engineer that was promoted to manager decades ago, and is not a good manager because he is afraid of confrontation and not good with economics. Yet, he is the only one with the official authority to make hiring and firing decisions for this business unit, although for hiring decisions I make the decision and then he approves it. He avoids firing people whenever possible and is afraid to confront people even though he admits to me that he is dissatisfied with an employee and doesn't know what to do. I only ever got one employee in trouble and that was when there were no other options.
So, given plenty of cooperative co-worker engineers and technicians, a technically excellent but managerially weak boss, and one problematic technician in my group that can be given direction from men but not women, I work within the system. I learned what sets him off, what makes him productive, and filter my directions through a man so that he does what needs to be done. So he's nice to my face, engineers and technicians consider him hard to work with and see the problem from my point of view and help make it work, and we meet deadlines.