I refuse to have a battle of wits with an unarmed opponent.

Related:

• I refuse to have a battle of wits with an unarmed
  opponent...
• I refuse to have a battle of wits with an unarmed
  person...
• I refuse to have a battle of wits with an unarmed
  person...
• Don't have a battle of wits with an unarmed
  opponent...
• Never enter a battle of wits
  unarmed...
• Never engage in a battle of wits with an unarmed
  person...
• In the war of wits,
  he's unarmed...