The part of a sentence "knowingly or unknowingly" is correct and usable in written English. You can use it to suggest that an action, either intentionally or unintentionally, was taken. For example: He took her possessions without her permission, knowingly or unknowingly.
Were they all, knowingly or unknowingly, unorthodox — or even heretical?
"In my life I have never done a wrong thing knowingly or unknowingly.
"And I think that's what he did; knowingly or unknowingly, he sent a message.
We deal with questions that architects, knowingly or unknowingly, must always address: What is space?
"People make mistakes whether knowingly or unknowingly," he said, but warned that did not excuse illegal activity.
Some of this information is regularly and publicly repeated today by former C.I.A. officials, either knowingly or unknowingly.
But such measures can't prevent a sick passenger from knowingly or unknowingly coming aboard and infecting others.
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Claudia Letizia
Head Translator and Proofreader @ organictranslations.eu