Answer:
Go check this out for the great answer:
http://www.businessdictionary.com/definition/scientific-knowledge.html
Actually it says here that there are four different forms of scientific knowledge.
1.independent and rigorous testing
2.peer review and publication
3.measurement of actual or potential rate of error
4.degree of acceptance within the scientific community.
Hope this helps. I'll be more active here. I'm bored on facebook. I'll help u more. msg me in my profile here in wiki.answers.com :)