"But my shirt says..."

So Kaden got this t-shirt last December from his Nana and Papa that says "If mom says no, ask grandma." He really got a kick out of it, but it's been a while since he's worn it...but last night he asked me for something and I said no; when he started to ask my grandma for the same thing I cut him off, telling him I had already said no. So he replies: "But my shirt says to ask grandma!" It was pretty funny...I couldn't argue.