A man in a black business suit stands upright next to a man wearing blue and leaning against a railing.
The man in the black suit is planning on robbing the man in blue next to him.
Just because he is standing next to the man in blue does not mean he is planning on robbing him, this is not revealed until the second sentence
Just because a man in a black business suit stands upright next to a man wearing blue and leaning against a railing doesn't necessarily mean that one man is planning on robbing the other man.
A man can wear black without planning on robbing anyone.