The phrase "ever determined" is correct and usable in written English.
It can be used to express a sense of ongoing or continuous determination in a particular context.
Example: "She was ever determined to achieve her goals, no matter the obstacles in her way."
Alternatives: "always resolute" or "constantly committed".
Even before Newton came along, in the 1640s and 1650s, Italian scientists Francesco Grimaldi and Giovanni Riccioli made the first calculations of the gravitational constant, meaning it was the first fundamental constant ever determined: even prior to Ole Rømer's determination of the speed of light in 1676.
No motive was ever determined.
"What's fascinating is no one had ever determined how social behaviors are controlled.
Ever determined to find you a husband, your mother will next set you up with Superman.
He returned to the ice, working harder than ever, determined not to disappear from skating's spotlight.
Although both regions are known to be involved in learning rules that become automatic enough for us to follow without much thought, no one had ever determined each one's specific role.
You always made sure that no one could ever determine who wrote it".
College football is all about its rivalries, those traditional matchups that endure and now more than ever determine championships.
The first is a proof within quantum theory that no evidence can ever determine its explanation, so that an agent choosing an explanation must do so unpredictably.
As Mr. Powell asked, how could inspections ever determine which 18 of Iraq's tens of thousands of trucks carry mobile biological weapons labs?
However, since abstract objects must be nonphysical and nonmental if they exist at all, it is not obvious how one could ever determine whether they exist.
