If he's covered in the blood of others and chasing you with a dull, rusty knife---have @ it
straight away no, its very difficult ,it may happen sometime to assess a person,but not always
Only if you are shallow.
Not all the time...Looks can fool us...for instance a homeless person may be the most generous person alive and have hidden wealth...and a very beautiful Man or woman may look good, but have a very dark heart....I never judge a person by their looks...
Your assesment if good may have a good chance of being correct. But you can never really Know anything about another person unless you o to the effort to investigate them to confirm or refute your assumptions.