I'm so sorry; I should have known better.

Meaning

Acknowledging lack of foresight.

Examples

• John: 'My actions were inappropriate, Alice.'
• Alice: '<b>I'm so sorry; I should have known better</b>. I'll try to do better next time.'
• John: '<b>I'm so sorry; I should have known better</b>. My judgment was poor.'
• Alice: 'You could have handled that differently, John.'