The dialectical method is a political system that involves a planned dispute between two opposing sides designed to find the best plan of action. The system is much more efficient when the people unknowingly involved are emmotionally driven for a certain veiwpoint. It is used everywhere from trials to school district administration to nearly all governments across the world, countries like the United States have political parties which gives the dialectic a much more organized structure and can also function as a form of social group identification.
I do not fully understand what you mean. The studies on the neurology of transsexualism new or old do not contradict each other in any significant way. Chromosomes or the presence of an SRY gene is not always an accurate representation of prenatal level of hormones or gonadal tissue.