Memory of what?
Granted. Noone knows how to talk, walk etc. Humanity is extinct within a month as most people die of dehydration and hunger
Walking and talking are both instinctive, acquired behaviors, not learned knowledge. This is why you can’t teach a child their first language or how to walk - they have to reach the developmental stage where this process will happen automatically, and teaching has little-to-no effect whatsoever on the acquisition process.
This is also why amnesiacs are always able to walk and talk (unless they’ve also specifically undergone damage to Broca’s or Wernicke’s area, or the motor cortex).
Also, even if humans somehow did “forget” how to talk, language is a human instinct, communication would resume almost immediately, and within a single generation new, fully-featured language would have developed. We can see this with Nicaraguan sign language, for example.
Also also, it would be very difficult to completely drive humanity into extinction. Even if that generation “forgot” how to walk and talk somehow (whatever that might mean), it’s basically guaranteed that plenty of humans would survive across the surface of the earth to continue the species nonetheless.
No, humans definitely need to learn how to walk and talk.
Just because it happens subconsciously doesn’t make it any less learning. Babies don’t know how to walk, they need to practice and learn it. Nor do they know how to speak, they must also practice and learn it.
If you were to unlearn everything in your life, your brain would be indistinguishable from a newborn - by definition. Your brain only changes itself through learning. Also, adult brains have has far less neuroplasticity than toddlers so enjoy being unable to learn even a quarter of the knowledge you gained when you were a child.
But the post doesn’t say that we “unlearn everything in our life” - it says we lose our memory.
Acquired behaviors (note that I won’t refer to them as “learned”, because the distinction made between “learning” and “acquiring” is a useful one for many reasons - I’d be happy to go further in depth here if you’re interested!) are stored in different parts of the brain than what we commonly refer to as “memory”.
If you’re hung up on the definition of memory, we need look no further than the fact that a common synonym for amnesia is “losing one’s memory”. If you want to use a definition of “memory” that goes beyond what people usually mean when they say it, that’s fine, but then our comments here seem to boil down to a disagreement over definitions, rather than a disagreement over empirical facts.
Farming on the other hand…
What was your wish again?
What’s a wish?
What?
Granted.
You don’t remember what is is or why you’re holding it, and it’s pretty gross. So you throw it in the trash.
Soon after, it’s incinerated in a waste plant.