How do you know if someone is sincere in what he/she says to you????

Saudi Arabia
@jemaries (322)
June 21, 2010 8:25am CST
well i asked this question because i tried to out my guilt if that person is really sincere in what she says,because when i talked to her i knew in myself that im true to her, but when she talks to me i knew it that still there is anger or the sorry that comes from her mouth is not sincere!!!!