>1. ultimately, I feel that if a questioned is answered objectively and rationally by someone who is well informed on the topic at hand, it is impossible to determine their race...truth is truth and I don't believe it can stem from a racial perspective.

That is if the person has enough awareness to try not to answer a question without influences of language, standards or cultural references. I can be well-informed and still drop knowledge that someone in my 'hood would understand. Kna' mean?

2. Forget the dialect of the text, as when we type we lack voice, tones and inflection making it easy to "impersonate" or use slang in an attempt to portray a particular race, also anyone who falls victim to this attempt at a portrayal is making an ignorant judgement themself.

Perhaps. Awareness of context is the key to what a person types or writes. However, it is the choice of the person typing to engage the reader through slang to get a response or just type. However, some people can't communicate without slang or without referring to some code.

3. You can't even trust statements that are blatantly racially biased as the anonymity of the net hides us. Someone could just be trying to rile heads, Knamean? Also people are fucked up, maybe there's a white dude posting "kill whitey!"like statements cuz he hate's his own race and's bugged out...etc. You can't know.

Usually, people can be drawn out through further communication.

5. I think what you have to do to maybe get an idea of someone's race is pay attention to subtleties in people's posts which most likely result from their being a particular race

Awareness is key!

"Know thyself"

"Let your conduct be without covetousness; be content with such things as you have. For He Himself has said, "I will never leave you or forsake you". So we may boldly say, "The Lord is my helper, I will not fear. What can man do to me?"
-- Hebrews 13:5,6

"There is a difference between knowing the path and walking the path"
--Morpheus in "The Matrix"

"It's our choices, Harry, that show what we truly are, far more than our abilities"- Dumbledore to Harry Potter "Chamber of Secrets"

<--- Blame this lady for Nutty.