am i smart or the world dum

I can't answer your question for you, that is up to you.

I will say thank you for asking it. You made my morning by proving a point I was just making to my thirteen year old daughter and providing a good laugh. ; )

i was just being lazy i didn't want to put in the time it takes to be correct , so i on my free time don't try as hard.

what point were you trying to prove

You are forcing us to make the assumption that your statement "i can explane things like philosophy by my self" is indeed a given fact rather then a possible self-delusion. Perhaps the teacher or some higher expert doesn't agree with your biased self-assessment. Also, philosophy isn't an exact science and thusly can not be quantified in exact terms of right and wrong. Philosophy is is a subjective art.

There are more forms of intelligence exist then the mere understanding of philosophy. "[Howard] Gardner identified seven relatively
autonomous capacities that he named the multiple intelligences: linguistic, logical-mathematical, musical, spatial, bodily-kinesthetic, interpersonal, and intrapersonal."
Dr. Howard Gardner, Harvard University professor:
http://pzweb.harvard.edu/PIs/MIat25.pdf

So your fellow students who you are claim might be "dum" [sic] maybe far more intelligent then you are in different academic and social arenas.