  Brain science and artificial intelligence have made great progress toward the
understanding and engineering of the human mind. The progress has accelerated
significantly since the turn of the century thanks to new methods for probing
the brain (both structure and function), and rapid development in deep learning
research. However, despite these new developments, there are still many open
questions, such as how to understand the brain at the system level, and various
robustness issues and limitations of deep learning. In this informal essay, I
will talk about some of the concepts that are central to brain science and
artificial intelligence, such as information and memory, and discuss how a
different view on these concepts can help us move forward, beyond current
limits of our understanding in these fields.
