Sophie: "Mama, look, it snowed! Can I go outside and play in it?"
Me: "Oh, honey, you're still sick. You don't need to be out in the wet and cold."
Sophie: "But, Mama, you caught my cold, right?"
Me: "Yes, I did. I'm sick too."
Sophie: "Well... If you caught it, that means I don't have it anymore. So I can go play! YAY!"