you are entitled to an opinion
you are also entitled to your opinion. Just because you can't read it, it doesn't mean that it isn't possible.
as to why June 15 - August 15, October and December is vague
explain your reason HOW it is exact/precise
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You are somehow a bean counter...If you did read my full analysis, then you should also noticed that these dates are just steps to reach another step. June 15-August 15 is not vague. This is the time when sidereal Moon and Mercury appeared in the Sun sign in 1989. October and December might be vague for you but I purposely didn't go into more detail because Neptunian seems to be sure that her birthdate must be before october.