some people are  half minded. sometimes they agree to what u say - next time they contradict it. to handle with such persons is a difficult task.. that is there that they are not harmful, but disturb the living of other persons.  they are not offensive but they try to make u offensive by indulging  in wilful acts which u do not like. i do not know that god has kept them in which category - sensible or insensible - i think there may be a category between sensible and insensible where they can be fitted best.  one boy after interaction on photography, wrote in the post that he doesn't bother for knowledge and that he does  not care for experience. he is 24 only. a human being's sense of knowledge and experience comes  after he is nearly 20 yrs old and has studied in school/college.  i do not think that in any age u can claim that u have full knowledge/experience of life/ any other things until and unless it is proved by yr actions in due course of time otherwise the position of halfminded person as stated in the beginning may result.