Well this agreement didn't occur in a single chat but in many many chats. He did initially told me about his preference not to help me in a specific way, at first I argued because I wanted him to fully help me but he ignored those arguments, then I tried to understand him and made a concession and he agreed to help. While there is evidence to suggest that he is unwilling to help me, I don't think that the evidence would rule out other alternatives and if you want I could list them. Maybe but it's worth doing something about it since it's difficult to convince people to help me. — Msr 1 min ago

Have a look at these related questions: How should someone apologize when both parties were wrong?, Friendly co worker suddenly distant/rude because of different views and How to apologise for how you said something without going back on the content. — Elmy 1 min ago

I'm voting to close this question as off-topic because it should be on workplace. Boss-employee relationships are different than interpersonal. — Joe S 53 secs ago

I'm confused by "I had learnt a great deal about this software already just by trial and error (and challenges), so when I read this PDF/Book I am struggling". It seems like if you already know the software pretty well, a lot of the book should already be familiar to you? Can't you just use the book to fill in gaps in your knowledge? — DaveG 40 secs ago

This answer might be a good one if you expand on why this script would work. — Meg 26 secs ago

both "could be" and "I will" even softened by "maybe" are in essence "good point" or agreeing. Leading with that feels polite - and is, to the stranger. What does it say to your child though? That you're doing something you know might not be best? And anyway, whether you agree and then add clarifications or disagree and explain why, you're still tacitly giving this complete stranger a vote on how you do this, giving weight to their unsolicited opinion. If they told you "you don't have the right shape of neck to wear that scarf" you wouldn't give them the time of day, right? Same for this. — Kate Gregory 1 min ago

One suggestion - I'd recommend not bolding "Your children pose no threat" as it makes this stand out and connects it with the previously bolded sentence "Your children are not vaccinated". When skimming over your answer, I read this as "Children who aren't vaccinated pose no threat", which is clearly untrue and not your intention. — LeopardSkinPillBoxHat 38 secs ago