![Not to Not to](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Not to "Sin City" but to "SINCERE city."
The Big Bang Theory Season 9, Episode 13
![I sense that's not sincere,
although I have no idea why.
I sense that's not sincere,
although I have no idea why.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
I sense that's not SINCERE,
although I have no idea why.
The Big Bang Theory Season 3, Episode 11
![If you're interested in making
a sincere effort to be a good teacher...
If you're interested in making
a sincere effort to be a good teacher...](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
If you're interested in making
a SINCERE effort to be a good teacher...
The Big Bang Theory Season 8, Episode 2
![And I want you to know that
that is sincere. I do feel bad.
And I want you to know that
that is sincere. I do feel bad.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
And I want you to know that
that is SINCERE. I do feel bad.
The Big Bang Theory Season 9, Episode 13
![Did you make the apology
as sincere as I would have?
Did you make the apology
as sincere as I would have?](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
Did you make the apology
as SINCERE as I would have?
The Big Bang Theory Season 9, Episode 23