The phrase "and could be certain" is grammatically correct and can be used in written English.
It can be used when discussing possibilities or conditions where certainty may apply in a given context.
Example: "The results of the experiment are inconclusive, and could be certain if we conduct further tests."
Alternatives: "and may be assured" or "and might be definite".
His band's reputation was spread by file-sharing and allowing fans to record concerts, and he could be certain that his Central Park performance would be copied and passed around.
It will be a long day; and who could be certain when we will eat next?" For this reason we ordered three breakfasts for the two of us, and ate very much sausage, which is a delicious food.
By looking at the messengers Dr Crisp and Dr Boschetti could be certain they were recording active genes and not stretches of nuclear DNA that had once been genes but now no longer work.Useful immigrantsFor every transcribed messenger, they searched the world's databases, looking for matches.
And, maybe, you could be certain that no matter how many design fads come and go on the Internet, Craigslist would pretty much look the same as Craigslist has always looked.
From the above SAED and EDXS results, it could be certain that the main CNNC bodies are amorphous CN x, and the [N] content in them synchronously decreases as the CH4/N2 ratio increases.
However, it would be important to check that link between testosterone levels and behaviour before we could be certain".
However, his colleagues rejected any such proposal, even regarding him as "Hitler's office boy" by now and pointed out to the fact that the Japanese army, with its light and medium tanks, had no intention of taking on Soviet tanks and aircraft until they could be certain that the Wehrmacht had smashed the Red Army to the brink of defeat.
I ventured near the mosque where I could be certain and, when I asked, was waved in the direction of my grandfather's furniture factory by men in slippers with defeated shoulders and waved again down to the beach to where our house once was.
