Conclusive research shows that African-Americans do not engage in riskier HIV behaviors than other Americans.

WHITEHOUSE: Addressing HIV in the Black Community

Nevertheless, the evidence from more than 50 years of research is conclusive: for a large majority of fund managers, the selection of stocks is more like rolling dice than like playing poker.

FORBES: Should I Buy Facebook Stock?

His research is still far from conclusive, but he has already come across cases of attempted suicide without any symptoms of depression.

ECONOMIST: China

Despite years of research, there's still no conclusive proof cell phone radiation causes cancer and other health problems in the brain.

CNN: John D. Sutter

Research into the neuroscience of sex addiction has not been conclusive, the Mayo Clinic said.

CNN: When sex becomes an addiction

This is not conclusive evidence that fertility has been reduced in these men, say the research team, but certainly should lead to further investigation.

BBC: Fertility threat for dioxin babies

They have to essentially agree to their previous agreement on the research reactor, and I think the world is watching and waiting for their conclusive decisions on that.

WHITEHOUSE: Press Briefing