I like to believe gender neutral words come from people mumbling a combination of the gendered ones and hoping that the listener assumes its whichever one relates to them.
Just people with anxiety creating new grammar one nervous encounter at a time.
What’s bothering me is, mathematically that is the answer, but practically the apple is a non uniform shape so you cant really determine where a third of the apple truly is and it has seeds in the middle meaning two of the kieces will have seeds one the one getting the two cut off pieces won’t so its not truly shared equally.