The phrase "is relatively certain" is correct and commonly used in written English.
It can be used to express a level of certainty that is not absolute, but still strong or significant. Example: "Based on the evidence presented, it is relatively certain that the defendant committed the crime."
Indeed, the Art Deco facade may be the only aspect of the Metro's future that is relatively certain.
The business, grim as it is, is relatively certain, as long as you get the math right.
Although the samples collected on site last week by United Nations weapons inspectors are still being analyzed, the BND is relatively certain that the chemical agent in question in sarin.
"In the United States, they realise that this is wrong, and they have a 95-year copyright protection period, so at least it is relatively certain that the artist will be dead by the time the copyright becomes public property.
The mass loading is relatively certain for the large number of proposed OWS.
BP management should not even think about a dividend until it is relatively certain of its final liability related to the Gulf of Mexico oil spill something that is some time off.
We lived in a period of relative stability in Korea for the last 50 years, encountering difficulties, but being relatively certain of what needed to be done in response to each challenge.
The exact relationship between Erdoğan's government and Isis may be subject to debate; but of some things we can be relatively certain.
But I'm relatively certain most don't have a welcome center with a D.J. playing a reggae version of Nirvana's "Heart Shaped Box".
We don't have a definition for cure as we do for certain cancers, where after five years or so you can be relatively certain the person is not going to go and relapse".
People familiar with S.E.C. practice said yesterday that, despite the sweep of the S.E.C.'s request, the specificity indicated the commission was relatively certain of what it expected to find.
