How do you know you are?

I published this post on my The World is Your Diary, but I'd like to post it here, too in case anyone reads it.

How do you know you are?

During a lesson on the human condition today, I asked my students to respond to the following journal prompt:

What makes us human? How do you know you are human, anyway?

I (and my students) would like to know what the world thinks of this question, so please take a moment to respond thoughtfully in the comments. Do it for the children!