Why do the ignorant perpetuate the thought that gender and biological sex are entirely different?

English is a very vast language, with roots in many other languages. gender and sex are synonymous, and describe the same thing, except for the act of sexual intercorse being called "having sex". this is due to the root language of these two words. that is the only difference. there are many words that... show more English is a very vast language, with roots in many other languages. gender and sex are synonymous, and describe the same thing, except for the act of sexual intercorse being called "having sex". this is due to the root language of these two words. that is the only difference. there are many words that are used to describe genitals, arent there? how many other words can you think of for penis? i know 5.... furthermore, if gender and sex are different, then why is this sentence called gender identity? ""i feel like a girl who was born in a boys body"" also, what is with this whole ridiculous bullcrap of "their truth" there is only THE truth. which is factually verifiable and is universal. ex we do not know what the inside or even the very surface of a black hole looks like, because there is no light in order to see it. we know its there, but can not see it no matter what. we need light to see. also, like binary systems. ex on and off. absolute....... xx and xy. our 23rd chromosome. you are male. or you are female. point blank period end of discussion, moving on. there is the possible deformity of xyy but is exponentially less common than the number of people who claim they have it. and finally, mental deficiencies and deformities and illnesses, can alter the cognitive function and behavior of a brain, but the brain itsself is fundamentally different in males and females. so, how can you possibly claim that gender and sex are different, if they actually are the same?
Update: nobody cares if you feel like a girl. and comparing YOUR truth to THE truth, if those two are not identical, is called being deranged. 
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