I see this problem often with headlines on HN. Title case has one benefit – it reveals that a sentence is a title – but in doing so it makes proper nouns (like

I see this problem often with headlines on HN. Title case has one benefit – it reveals that a sentence is a title – but in doing so it makes proper nouns (like Apple's “Jobs”) indistinguishable from other words (like Apple's “jobs”). On HN, it's obvious that the titles are titles simply because of their location, so title case has no benefit. But we lose a lot by using title case, because we can't distinguish between “slack” and “Slack,” “flow” and ”Flow,” “wave” and “Wave,” and “medium” and “Medium.” New words are constantly being added to the list. Every day, many dictionary words are appropriated as new proper nouns, (today, I see that “Lobster” is now a proper noun), so when HN visitors read a headline in title case, they have to consider the possibility that every one of the capitalized words is a proper noun.