"I've decided it might be." Even if he was right to say that just getting close enough to Norrell to do it would be difficult. And though Eames is nothing to scoff at in terms of power, Norrell is strong enough to make it difficult if he fights back. And Eames wagers his manservant is equal in that regard, something he doubts Norrell is entirely aware of. "Either way, we'd all be better for it."