Usually I'm a harsh critic of text like this because casual language and what look like casual words but are actually strictly defined domain specific technical definitions are utterly indistinguishable.

However! This book back-references its appendix with grey underlines thus signaling that something has a technical definition and is jargon.

For instance, "loss" is really common English. In ML it's a loss function. You can clearly see it's a special word in this world in the text. Other examples include weights, capacity and channel.

I don't have to sit there confused trying to guess which English words are being used in special ways.

This discipline is fantastic. In some texts, such terms might be italicized but that behavior has seem to fallen out of practice.

As someone who isn't a professional mathematician, hints like these help greatly.