Meta: why is the word "how" omitted from the title? I've seen this a couple of times recently and I don't understand why people are omitting words like "how" a

Meta: why is the word "how" omitted from the title? I've seen this a couple of times recently and I don't understand why people are omitting words like "how" and "why." The only thing I see in the guidelines is about omitting "gratuitous" numbers and adjectives, neither of which "how" and "why" are.