I believe you've misunderstood this. A function can be very long and do only one thing or very short and do many things. The function: func ManyThing(i int)

I believe you've misunderstood this. A function can be very long and do only one thing or very short and do many things. The function: func ManyThing(i int) int { fmt.Println(i) return i+1 } does two things, and it's two lines long. The function tcp_send_message_locked (https://github.com/torvalds/linux/blob/master/net/ipv4/tcp.c#L1174 https://github.com/torvalds/linux/blob/master/net/ipv4/tcp.c...) does one thing at it's 261 lines long. Shorter code is _indicative of_ orthogonality (what he asks you to break on)__but_ it is not the same thing.