It really is pointless trying to discuss anything related to that branch of study with them, from whether sexual reproduction is a type of reproduction to whether life begins before or after toddlerhood. I mean, think about it. They don't need to listen to what you're saying about it, since they already know they're more intelligent, educated, enlightened, compassionate, perfect, and good than any non-leftist could ever be. They don't need any facts you could provide, since they're more than capable of making up their own as necessary. They don't even need each others' opinions on the matter, since a core aspect of their ideology is that there is no objective reality and so what's true is what's true for you. So I have to ask, why even broach the topic with them when we approach it from such irreconcilably different directions?
Yeah... I've noticed that myself and after years of intense study of that phenomenon, the evidence indicates that the Left simply lacks the means to reason objectively.
The Scriptures tell us that this is a function of nature, wherein the being loses the spirit... thus is left as a mere soul, thus losing it's kinship with reality, due to the infestation of evil.
Personally, I doubt that such has ever been more keenly identified than in the following observation from Linda Kimball:
"Nietzsche was the first apostate Christian to gaze fully upon man's loss of faith and its terrifying consequences. With no living God 'up there' to obstruct his vision, the nihilism he saw was agonizing. As there was no longer any Light from God above, there was only darkness in the hermetically sealed world below. The paralyzing darkness that overtook the mind of the 'new' Christ was spiritual. It was not so much,
"....
an exterior phenomenon crowding inward but rather an inner blinding that spread outward." (Ravi Zacharias, p. 27)
This was precisely Nietzsche's point. With the death of the personal God of Revelation the darkness of objective meaninglessness would penetrate every avenue of thought and life, making life itself unbearable with the consequence of hedonism, abortion, euthanasia, sodomy, suicide, drugs, crime and murder becoming virtues.
Speaking through the writings of the 'new' Christ, Zarathustra went on to say that because God had died in the 19th century there would follow two terrible consequences beginning in the 20th century. (Romans 1:18)
First, the 20th century would become one of the most evil century's in history, and second, a universal madness (Romans 1:21, 22) would break out and turn the once glorious W. Europe and America upside-down.
Though apostates and the apostatizing professed themselves wise, their cognitive thought processes would become darkened (vain) and with their conscience dead to sin they would become fools, meaning they would accept and publicly profess incredibly stupid conceptions of themselves (i.e., man is an evolved worm, ape or robot; man is evolving into god).
"And I will give children to be their princes, and the effeminate shall rule over them." Isaiah 3:4
In turning away from the Spirit of God and the truth He has given, 'wise' males will become effeminate cowards and females mannish. They will be adolescent emotional-tyrants in adult-size bodies: sinister, greedy, spiteful, vindictive, treacherous, back-stabbing sophists. They will celebrate Lucifer (the devil) and in their madness actively seek the way of Luciferian initiation because they will be spiritually blind in regard to total reality. Like demons they will flee from the cross of Jesus but exalt the devil as the first free thinker, the genetic creator of man, the seething energy and angel of evolution. Truth will be lies, evil will be good, unfaithfulness will be faith and the 'wise' will preach and blaspheme from pulpits, exercise political power, enact legislation, and wield broken law to plunder, punish, and ruin.
Zarathustra has been right on both counts. First, apostatizing W. Europe and America, though dotted here and there by small islands of Light, decency and sanity, are becoming darkened, satanically inverted places ruled by the 'wise,' hence boiling over with madness, particularly Hollywood, academia, mainstream media and the highest, most powerful political offices in the land. Second, Nietzsche was made to show the 'wise' what is in store for them by spending the last eleven years of his life
insane."
In short, they're simply delusional... Which was of course the 'mental disorder' that the APA simply decided didn't exist back in the 70s. Which was of course, due to the aforementioned mental disorder.
LOL! With such representing a quite literal example of
"The Inmates running the asylum".