why is camouglaging an illusion? for example, if you would please google "brimstone butterfly camouglage" [pictures], you will see that these butterflies camouflage and are green, so they look like a leave. so my question, as I stated before, is how is this an illusion? why do we consider it an illusion?
I got a short answer saying that the reason we consider this an illusion is because if we don't look at it carefully, we might think that it's a leave instead of the butterfly, so it might feel like our brain is tricking us. Well, that's my main point.
I would really appreciate it if you expand it a bit and add more ideas.
There's another question that I have trouble answering.
1. How can science be used to give us a better understanding of this phenomenon if our eyes can't be trusted?
Thanks for any help :)