Layman’s terms

Layman’s terms derives from the 16th-century idiom “in plain English” meaning to explain something simple enough that a layperson (common person) would understand.

But there is a difference between speaking to someone like they are a five-year-old and speaking so clearly that even a five-year-old could understand.

A note to the audience: Just because we don’t understand something doesn’t make it less true.