The Art of Generalizing-I

This time I headed towards the most sympathetic of my friends. It had been a horrid day at office and I was feeling too sensitive to handle what my other friends generally tend to hand out to me. I poured out my tale of woe to him.
"So, you said that the proposed pricing policy for the new product would not even cover the raw material costs. And the marketing guy accused you of being biased against the marketing function. Right?"
"Yes!"
"And, of course, you said it was no such thing, that you had supported them in a past instance. And he cited ten other times when you had opposed them and so on and so forth?"
"Yes, I told you..."
"Your marketing guy is an expert at the art of generalizing. Instead of arguing the specific point you raised, which he probably could not counter, he made it a problem of your general attitude to marketing. Now, it is YOU who were on the defensive instead of him. And, I am sure that his proposal was approved."
I was stunned. That was precisely what had happened.
"You, I am sure, in his place would have been arguing why the price had to be kept low. And keep giving more and more ammunition to more and more people to attack the proposal."
"Well...is that not what we are there for? I mean, the idea is to make the best possible decision for the company, not score brownie points..."
"Yeah! Well! Who do you think is going to get a better raise next year, you or that marketing chap?"
Shit! I really need to learn this generalizing thingy. Fast!