"have incomplete knowledge" is correct and usable in written English.
You can use it anytime you wish to point out that something is not fully understood. For example: "The scientists have incomplete knowledge of the true impact the experiment will have on the environment."
Because users of online social networks (OSNs) may encounter others whom they have incomplete knowledge of or no previous experience with, trust propagation has become increasingly necessary in many real-world applications.
Human purpose, with the necessary limits of our knowledge, is now projecting mutations with unknown effects into an overall bio-system of which we have incomplete knowledge of all the feedback loops.
Disentangling the various pieces of information is challenging given cattle are a non-model organism and we have incomplete knowledge of bovine functional genomics.
Third, measurement error in assessments of rice consumption is inevitable, and we have incomplete knowledge of the extent to which such error may bias our results.
First, we still have incomplete knowledge about how the climate system will respond to continuing change in the composition of gases in the atmosphere.
We still have incomplete knowledge of apricot domestication and diffusion into the Mediterranean Basin based on the assumption of a genetic diversity decrease [ 35] and balancing between one [ 25] or two major diffusion routes [ 24, 26].
It is assumed that an individual, when faced with the necessity of making a decision that may have different consequences depending on situations about which he has incomplete knowledge, can express his personal preferences and uncertainties in a way consistent with certain axioms of rational behaviour.
It is an essential component of an agent design whenever the designer has incomplete knowledge of the task environment.
That a person has incomplete knowledge about a certain topic does not imply without further assumptions that there is some specific fact she does not have knowledge of.
"Mr. Clarridge has incomplete knowledge of the daily, not weekly briefings, that Dr. Carson receives on important national security matters from former military and state department officials.
The first results from clinicians having incomplete knowledge of the situation.
