The left- and right-hand paths often overlap, and this is sometimes called 'grey' magick.

With this much grunt, it is surprising that the engine is relatively quiet.

The column of fire now ascended above the main-top--licking with its forky tongue the top-mast rigging--and embracing the mainmast in its folds: and the loud roar with which it ascended proved the violence and rapidity of the combustion below, and how little time there was to be lost.

Therefore, regardless of whether there is a physiological cause of or predisposition to the desire to change sex, I don't think such a cause or predisposition can consistently be required by the rejecter in order for transracialism to be legitimate.