A speaker addresses a person for various reasons. For example, s/he may see that the listener is distracted and s/he may want the addressee to focus more on what s/he has to say. Moreover, it can happen in the middle of a speech, because what will follow is really important and s/he feels the need to underline it by asking for more attention from the listeners. Furthermore, the speaker may address a person because s/he may want to talk specifically to this person about something or in order to give him/her the stand.
So, from all the above, it could be concluded that the basic request of the speaker when s/he addresses a person is to grab the listener's attention.
Average temp in November - Average temp in January = X
where X = the difference between average temp in November and average temp in January
-1.7 - -13.4 = 11.7
the average temperature in November is 11.7 degrees warmer than average temperature in January
The sentence "Moreover, it is probably just as valuable or more valuable to us now, than it was in the ancient past".
A logical fallacy because that is an argument without proof or without valid reasoning
The singer, who was very talented, knew the words to the song.
