How do you KNOW?

Ontologically variant viewpoints; one must guess.

Realism is dead. Optimism is a lie, pessimism too!

Forthrightness more than honesty. Honesty more than genuineness. Genuineness more than sincerity. Sincerity more than authenticity. Authenticity more than posthumously great. Posthumously great more than death. Posthumously known – please not me this time.