Silence is used a lot in music. the 4'33 is silence in music used to the extreme.

That's not actually what the piece is about, really. And yes rap is music, it's just a different type of vocals. All good and fine if you don't like it, but it is still music.

classic rock isn't music imo

Rap focuses on rhythm rather than melody. A rapper can whip his rhymes around in structural patterns or more progressive riffs just like a guitar solo. Like scatting with words. If death metal growling is considered music rap has to be.

Why? Classic rock obviously has melody, harmony and rhythm.

I would rather listen to preaching in church, than pointless yapping. I consider the lyrics of rapping to be dumb literature. I would rather listen to Shakespeare, than rap.

Rhyming in structural patterns? I would rather listen to a melody made by a genius, who studied and analyzed composition and went to school, than some thug, who dropped out of fifth grade. Don't start mentioning Tupac or Jay-Z or something, I personally don't consider them heroes or poets.

Yes. Rap is music. Thanks for asking. I'm glad I could clear it up for you.

Obviously your mind is already closed shut in regard to rap but you're making ridiculous statements. Compare some of the inane metal lyrics with this.

In 1995, you'll twist to this
As you raise your fist to the music
United we stand, yes divided we fall
Together we can stand tall
Brothers that try to work it out
They get mad, revolt, revise, realize
They're super bad
Small chance a smart brother's
Gonna be a victim of his own circumstance
Sabotaged, Shellshocked, rocked and ruled
Day in the life of a fool
Like I said before to live it low
Life take you time, time yo go slow
Look here, not a thing to fear
Brother to brother not another as sincere
Teach a man how to be father
To never tell a woman he can't bother
You can't say you don't know
What I'm talkin' 'bout
But one day ... brothers gonna work it out

First of all, you're obviously not actually listening to death metal.

Secondly, whether or not a vocalist sings, if he's growling or screaming, then by your standards, he shouldn't be making music.

classic rock isn't music. pointless guitars and pointless machismo lyrics made by drug addicts that probably didn't even go to college! all dumb literature if you ask me.