i think its pretty literal, isnt it? for example:
if someone asks "are there any restaurants near by?
someone might answer "none that i can think of"
or if someone asks "have you heard anything about ____ since monday?"
and the person might answer, "no, not that i can think of"
its just a longer way of saying "no"
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What is the meaning of the phrase 'Not that i can think of'?
It’s somewhere between "No" and "I don’t know".
Q: "Are there any restaurants open at this time?"
A: "Not that I can think of."
The answer means “No, as far as I know – but I might be wrong”.Source(s): Native UK English speaker
It depends on the circumstances but it generally means he is glad you didn’t tell on yourself.