Problem: Sometimes you read something on the internet and think it could benefit from additional facts, aspects or clarifications. For example on the various StackExchange sites, when you read an Answer and something is missing or unclear or just plain wrong.
Sadly, sometimes the author gets upset and defensive to such attempts.
As this is a very restricted form of communication you can´t use expressions or tone of voice to deescalate, so such incidents are naturally not very helpful to get the core information across.
The desired outcome it that the recipient of the comment openly considers the information/idea for improvement, without feeling attacked or lectured etc.
What is the best way to communicate possible improvements without triggering a negative response? Are there typical formulations to prefer or to avoid?
I want to refrain from giving specific examples, as answers then tend to get opinionated on who/what specifically went wrong in such an example. What I look for is a generally helpful approach that will help users of SE and elsewhere to communicate more effectively in that scenario