From cells to intelligent civilizations, the mechanisms of replication have similarities in how they carry across natural and programming languages constructing abstraction levels that become more and more intelligent over time.
The concept of consciousness and the assumption that it is linked to complexity, and how that correlates with our intuitions about consciousness.
The brain sends a copy of motor output to both muscles and sensory parts, which helps in cancelling consequences of motor act. Language and conversation provide an insight into how the brain functions.
The perceptual system tracks sensory data and predicts the next frame, building a relationship of functions to understand sensory information. The assimilation process involves making the sensory data fit into your model and understanding that structure.
The interface theory of perception challenges the idea that our senses provide us with accurate representations of the physical world. Instead, it suggests that perception is an interface that evolved to hide the complexity of the world and allow us to interact with it more effectively.
The theory of everything in understanding consciousness could be achieved by having greater control over individual neurons to understand how and why signals start becoming relevant to each other as part of some bigger signal that they're producing, forming a big picture of human experience. Keeping a toehold in both cellular level resolution and brain-wide resolution is necessary for this understanding.