Firstborn: "I think the cat has a plan."
Me: "That seems... not unlikely, now that I think about it."
Firstborn: "I think I know what the cat's plan is."
Me: "What is the cat's plan?"
Firstborn: "The cat plans to stand in the kitchen beside the pantry and act like he's really hungry, so you'll give him treats."
Me: "...I think you're onto something, here."