Special advice:
Watch the person's behavior (expressions, body language, etc.) closely if you suppose he/she could be against you (a short period of time is enough for judgement, small details do count).
Note: These are 'attention points', so if some of them signalize at your judgment, it means 'attention'. Be prepared for things to happen, this is what this document is about.
In this case, a 'traitor' can be a >fake friend >bad business partner and more. Last but not least, if a person is generally a real "pokerface" to everyone, then you need to be careful, and look for more approaches of judging.
Sources: Me
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