"That's not a valid excuse"

I have and my respinse is 'no, its a reason'

The response then, from the person telling me to "stop making excuses" or "that's not a valid excuse", if I say, "no, it's not an excuse it is an explanation or a reason", then they say "why are you so defensive" or "why are you always arguing" or "stop arguing". And I say "I wasn't arguing, I was explaining something" and then they say "There, see you are arguing now". I hate it.

This person is trying to pick a fight. The opening statement "stop making excuses" is just to put you on the defensive. When you react, the person turns it into your fault. The response is to shrug, say "If that's how you say it," and refuse to say anything more. They will try to get you back on their hook by saying other stuff, but it all comes to the same thing - this is the office equivalent of playground bullying. Don't respond to their taunts.

This person is trying to pick a fight. The opening statement "stop making excuses" is just to put you on the defensive. When you react, the person turns it into your fault. The response is to shrug, say "If that's how you say it," and refuse to say anything more. They will try to get you back on their hook by saying other stuff, but it all comes to the same thing - this is the office equivalent of playground bullying. Don't respond to their taunts.

I suppose I could say "oh well, if that's what you think" or something like that. I like to tell myself that it doesn't matter what other people think, it doesn't change the truth.