Phrases "I don't think it's good enough" or just "not good enough" can be a powerful tool to insist on doing sth you think is worth investing time into.
However, it can be made to sound a bit harsh. When using it in high-stake situations/with people you have to stay diplomatic with, make sure you use the appropriate tone of voice and a facial expression.
Do you always have a backup plan?
If things aren't going your way, can you stay positive?
And a bit of food for thought👇
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