Because of society's reluctance to admit that lesbians exist, a high degree of certainty is expected before historians or biographers are allowed to use the label. Evidence that would suffice in any other situation is inadequate here... A woman who never married, who lived with another woman, whose friends were mostly women, or who moved in known lesbian or mixed gay circles, may well have been a lesbian... But this sort of evidence is not 'proof'. What our critics want is incontrovertible evidence of sexual activity between women. This is almost impossible to find. 
The part of Hegel’s work to lay bare certain fundamental dynamics involved in recognition is the oft-discussed master-slave dialectic which appears in the Phenomenology (see Pinkard, 1996: 46ff; Stern, 2002: 83ff.). Hegel introduces the idea of a ‘struggle for recognition’, describing an encounter between two self-consciousnesses which both seek to affirm the certainty of their being for themselves (Hegel, 1807: 232ff.). Such a conflict is described as a life-and-death struggle, insofar as each consciousness desires to confirm its self-existence and independence through a negation or objectification of the other. That is, it seeks to incorporate the other within its field of consciousness as an object of negation, as something which this consciousness is not, thus affirming its own unfettered existence. Of course, the other also tries to negate this consciousness, thus generating the struggle which results in affirmation of one self-consciousness at the cost of the negation or annihilation of the other. Only in this way, Hegel observes, only by risking life, can freedom be obtained. However, there is a key moment with this struggle. Namely, consciousness realises that it cannot simply destroy the other through incorporating it within itself, for it requires the other as a definite other in order to gain recognition. Thus, it must resist collapsing the other into itself, for to do so would also be to annihilate itself. It would be starving itself of the recognition it requires in order to be a determinate self-consciousness.