Sneak and Show is a combo deck racing to cheat Emrakul, the Aeons Torn or Atraxa, Grand Unifier into play via Show and Tell or Sneak Attack, so we need proactive free disruption and hand attack. Force of Negation can stop Show and Tell or Sneak Attack on their turn for free, which is our best way to prevent the combo from ever resolving. Duress proactively strips their Show and Tell, Sneak Attack, or a protection spell before they can deploy it. Brazen Borrower's Adventure side can bounce a resolved Sneak Attack to buy another turn, while Daze and Flow State are too passive against a deck that can simply ignore our tempo plan and kill us outright.