if you read 15 to 20 papers I think you have a basic understanding of an- of an area like, maybe good enough to do some work, apply some algorithms. Um, if you read, um, 50 to 100 papers in an area like speech recognition and, and kind of understand a lot of it, then that's probably enough to give you a very good understanding of an area, right? You might, know- I'm, I'm always careful about when I say you're mastering a subject but you read 50 to 100 papers on speech recognition, you have a very good understanding of speech recognition.