I came across the word "[b]ilingual" when reading this online article from Medical News Today.com.
Prof. Marian explains in the paper that "[b]ilinguals' ability to seamlessly switch between two distinct communication systems masks the considerable control exerted at the neural level."
This is my first time to see that way of using "[]" brackets like "[b]ilingual", and I wonder what it means or how you use it. Could you explain it?