>>12016349>>12016761I just realized the mirror test is biased.
An ant can be programmed by its genes not to treat its reflection as other animal, if given a hint (like the sun reflection from the side of the ground, just meaning water in this case).
The mirror test is also biased, because most insects use antennas as their main sensing organ - they see the world by smelling and touching, therefore it is easy for an ant to distinguish their reflection from other ants, because the smell is missing.
Also what the fuck, some ants have only 6 pixels in their eyes.
>>12014065>efficient compared to the vertebrateEfficient in what exactly? Arthropods have simple brains with limited abilities - their reasoning seems pre-programmed in genes, considering for example flies not being able to understand there's a window in their way. I believe (I know, unscientific) that consciousness emerges from complexity and meta-brain functions - neural networks controlling the brain itself.
You can't find something like this in Arthropods all they do is being input/output machines.
>Large arthropods don't have bigger brain than smaller ones, which suggests that bigger brains are not necessary.This only confirms not much happens in their brains. Additionally intelligence and brain developed because there was strong selective pressure for the trait, if Arthropod brains are good enough, there's no pressure for its further development, there are many examples: some flat worms, Pentastomida, Cirripedia.
This can be helpful:
https://en.wikipedia.org/wiki/Encephalization_quotient 
