A NON-TEACHER'S OPINION
(1) I think that the problem lies in the word "best."
(2) "Science is my favorite subject." = I have 6 subjects. The one that I like most is
science.
(3) "Science is my most important subject." = I have 6 subjects. Maybe science is
is my favorite or not my favorite, but I understand that science is the subject that has
more meaning than history, English, math, nutrition, or public speaking.