I have been following James Hoffmann french press technique video. But am otherwise new to coffee-making in general and have two basic questions.
Is it necessary to stir after the four minutes as he says? I have heard some say that in certain situations it is actually inadvisable to do this, if so what are these situations?
Why is it unnecessary to plunge? He says not to plunge through the coffee—what effect does partial/full plunging have (on the pouring of the coffee)?