The poster can't know what is ostensible to you and what isn't, and nor does everyone here have the time to post sources for absolutely every single statement they make as if they're writing a university research paper.
As a reader, if you're unsure of something, use common sense and in the age of powerful internet search engines and LLM chat bots at your fingertips, it's up to you to quickly check for yourself, and only ask the poster for sources when you were unable to find the corect information by yourself, otherwise it's a waste of everyone's time.
Without a citation, any statement of ostensible fact is just unfounded rumor.