Most of this book is opinion; this is a fact. Nobody knows everything.
If you don’t understand something, ask a question. The cliché is true, someone else was probably wondering it too but was scared to look stupid.
Was there a word you didn’t understand? A process? What an acronym stands for? Ask it.
What’s really less intelligent? Asking a question or operating with incomplete information?
Pretending to look smart is a lot harder than it looks and it will catch up to you.