Title: My confidence in my understanding of the scientific theory.

A diagram where the confidence is marked in red on an otherwise white figure

Panel 1
"Before I got a book about it."
The figure is red up to about his stomach

Panel 2
"While I was reading the book."
The figure is reading a book. He is red up to his forehead.

Panel 3
"When I had finished the book."
The red level has dropped to around his mouth

Panel 4
"One week later."
Now it is at his chest.

Panel 5
"When I try to explain it to somebody."
The level is back at stomach level.

Panel 6
"When they ask a follow-up question."
The red is so low we can barely see it.