What is another word for learned the ins and outs?
Pronunciation: [lˈɜːnd ðɪ ˈɪnz and ˈa͡ʊts] (IPA) 
The phrase "learned the ins and outs" is often used to describe someone who has become very knowledgeable and familiar with a specific subject or skill. Some synonyms for this phrase could include "mastered the intricacies," "gained expertise," "developed proficiency," "became well-versed," "acquired a deep understanding," or "became a pro at." These phrases all convey the idea that someone has invested time and effort into studying a particular topic, and now has a strong grasp of its nuances and complexities. Whether you're talking about a hobby, a job, or an area of study, these synonyms can help you to express just how deeply someone has explored and learned about their chosen field.
