Hasn't that been ruled out by now though?
(Content warning: Zombie ant fungus details)
I read articles about that fungus and I believe for a long time it was assumed that the fungus rewires something inside the ant's brain that makes it want to climb to the top of a grass blade etc. - so it would "only" manipulate the high-level goals of the ant but not control the more complex and dynamic low-level operations (such as walking or navigating) directly.
However, a few months ago there was a paper about more detailed research on the molecular mechanisms the fungus uses for the takeover. Turns out, the former hypothesis was wrong and in fact it does control the ant's arms/legs directly. If that's true, then the fungus itself must somehow actively steer the ant towards the grass.
This seems to be the referenced paper: https://www.pnas.org/doi/full/10.1073/pnas.1711673114
I was wrong about it being from a few months ago though. It was released in 2017 already.
It is entirely possible that human motivations and reasoning are driven by similarly simple mechanisms. The best example I can think of is how much of an asshole I can be to my family when I'm hangry.
Where it gets interesting is it might not even be “you” that is hungry, rather it’s the collective microbiome that sends signals from your gut to your brain telling it to eat for their benefit.
I don't think the logistic map is conscious, but it is very complex. https://en.wikipedia.org/wiki/Logistic_map
What I'm talking about re: ants is a few chemical signals specifically targeting ant behaviors resulting in the infected behavior. I don't think the fungus is any more conscious than a handful of pills.
> The life cycle of the parasite Toxoplasma gondii goes like this: Toxoplasma reproduces inside the intestine of a cat, which sheds the parasite in its feces. Rats then ingest the parasite when they consume food or water contaminated with cat feces. The parasite takes up residence in the rat’s brain and, once the rat gets eaten by a cat, it starts the cycle all over again. > Researchers have known for a few years that a rat infected with Toxoplasma loses its natural response to cat urine and no longer fears the smell. And they know that the parasite settles in the rat’s amygdala, the part of the brain that processes fear and emotions. https://www.smithsonianmag.com/science-nature/the-parasite-t...
THC --> munchies! Alcohol --> saying dumb things at parties.
I'll bet there is a fungal chemical that disrupts the ant's spacial orientation, and absent of other stimuli, it may have a default program that causes it to seek higher ground.