Just wondering about the first two lines of 林俊杰's 曹操...

First line:
不是英雄, 不论三国

Since a conditional statement is equivalent to the converse of its inverse, it can therefore be rewritten as such:
P1: 论三国的都是英雄.

Second line:
若是英雄怎么能不懂寂寞

This is clearly a rhethorical question, which means:
P2: 英雄都是寂寞的.

We are thus forced to conclude that:
C: 论三国的都是寂寞的.


Just sayin'.