due to public demand

i was chatting with my sister yesterday and she told me that im the most complex person in the whole family...i asked her to explain how but sadly she couldnt.i wonder why she feels that...is it coz she doesnt know me well(but i am very much like her)or is it coz she never tried to understand(possibility).i am pretty sure my Mom wont agree to wha she said coz according to her my sister is very complex and we will never understand what she is thinking while i am very expressive and open...i thought about this a lot yesterday(its better than studying media laws) and i reached at a conclusion...all humans are very complex and one person cannot understand the other as a whole coz sometimes as humans we will never understand ourselves well so how can we understand other humans...what do you say?