Toothless.... I wonder?

I know he is my third child, but I really should have known the answer to this question.
It was a Monday morning. The phone rang. It was Zac's first grade teacher. She explained to me that Zac and his good buddy had run into each other (apparently pretty hard) during PE class. Then she said, "My question for you is ...Has Zac lost his front tooth yet?"
I could not remember. Isn't that terrible.
"Why?   Has he lost it now?" I asked.
"Not completely, but it is very loose and it is turning gray." She said.

I called my husband. He seemed confident that the injured tooth was a baby tooth....but he did not sound convincing enough for me.
I called my dentist who is a good friend of our family.... and she could not remember either, and she had not taken any X-rays.
I looked back through my camera and my pictures to see if I had photos of Zac with his front teeth missing. I had snaggle tooth photos of my other children, but not of him, but I still couldn't be sure.
Then I asked my mom.
She immediately insisted that Zac had NOT lost his front teeth. She was certain! And she was right!
I went to his school to check on him and to run him by the dentist....just in case. Of course, since the loose tooth was a baby tooth, there was nothing that needed to be done....it would fall out soon enough on its own.

So then...there was just me...wondering why I didn't know whether or not my own child had lost his front tooth.  His Grandmother had known, his Dad had known, but I had not known. And I should have.  He is my child for goodness sake. I have got to start paying better attention.

Still waiting for the tooth to fall out.