Everyone can think inside their head (Without producing any sound from their mouth). What is this called in English?
- He says: "This is good." but he internally says: "This is bad".
- He says: "This is good." but he internally thinks: "This is bad".
- He says: "This is good." but he internally feels that this is bad.
- He says: "This is good." but he silently thinks: "This is bad".
- He says: "This is good." but he says: "This is bad" inside himself.
- Something else that you would like to suggest.
I prefer the colloquial AmE. Slang is okay.