As the holiday season is upon us, the debate over Santa Claus once again reignited, viewers might render themselves a favor and rewatch a fascinating interview by astrophysicist Neil deGrasse Tyson on the topic of the tooth fairy, and how it relates to all the lies we might be inclined to tell our children.

In an interview with late night host James Corden, Tyson was asked whether he is “scientific” in response to his daughter’s childlike curiosity, or did he let her believe in myths such as Santa Claus or the Tooth Fairy. The response was much deeper than Corden or viewers expected.