Evap VS Indent

✨JBR✨ • Married for two years. Nanny. We're expecting our first baby in March!
What's the difference? 
I was under the impression that an evap was a false positive that appears if the test is out too long. 
An indent is a colorless line from a faulty test. 
I've read a lot of ladies use the terms interchangeably, but I was sure there was a difference. 
Correct me if I'm wrong?