That's a safe bet

• That's a safe bet: そうに違いない

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• Shane: I don't think he's from around here.
  （シェイン：　ここらの者じゃないな）
  Rick: I think that's a safe bet.
  （リック：　ああ、違いない）
  
  
  Robert Kirkman et al., The Walking Dead, VOL. 1: Days Gone By, Image Comics