Irregardless of other people's judgement

The London Daily Mail reports:

Revealed: The five genuine signs of intelligence that people can't fake - so how many do YOU possess? ...

1. You learn from your mistakes ...

5. You don't care what others think

Seriously intelligent people don't consider other people when making decisions.

They don't think about how others will feel as a result of their own actions and do things irregardless of other people's judgement.

Before you tell me that intelligent ppl would know that "irregardless" is not in the dictionary, look it up. Smart ppl do not worry about such trivialities. My dictionary says The Cubs Won the World Series, and 'Irregardless' Is a Word.