Even though this Discourse forum is no longer listed on the Community page, it still has a variety of helpful, interesting, thoughtful topics and posts.
Liking a post with 
allows participation in the discussion without generating noise on the topic itself and helps communicate to others which posts may have valuable content.
I’d like to propose adding a reaction for posts that respectfully conveys there may be a dilemma or confusion within a post. My favorite option is 
as it balances being respectful but still conveys confusion and questions.
EDIT: The classic 
also works well and is a common reaction on GitHub and other sites
for confusion and 
for agreement instead