This concept is related to a lie I told my son once when he was very small. It was his bedtime and I picked him up to carry him to bed. When I picked him up, he was suddenly able to see that on the kitchen counter there was a tray of muffins that we had made, and he got all excited about eating them. This would have been a huge disaster that would have utterly destroyed the crucial and delicate bedtime routine that allowed us all to get a small amount of sleep. In a moment of evil genius, I said, "No, those are just pictures of muffins." This gambit worked and he went to bed without any fuss. I still feel a little bad about it.

Just as my son got to eat a muffin the next day, your listeners can absorb the full meaning of your equations at their leisure after the talk.