Trump card

Domin The secret of their manufacture. Old Rossum's manuscript. As soon as they found out that they couldn't make themselves they'd be on their knees to us. Dr. Gall Madame Domin, that was our trump card. I never had the least fear that the Robots would win. How could they against people like us?

Desperate now to leave, Felix played what he believed was his trump card. ‘You’re forty-whatever. Look at you. You’re still living like this. I want to have kids. I want to get on with my life.’