Use 'not that' when you're unsure about something and want to clarify.

Expressing Uncertainty

It softens the tone when correcting someone, making it less confrontational.

Polite Correction

'Not that' can downplay the degree or significance of your statement.

Prevents overstating a situation, showing restraint in expression.

You can use 'not that' to clarify your stance without complete rejection.

Use it to disagree softly or present a counterargument gently.

'Not that' conveys a sense of resignation to the unlikelihood of changing the outcome.

Indicates what's being said might not be relevant or influential in the larger context.