ascertains

the detective ascertains the facts of the case.

she ascertains the best route to take for the trip.

the teacher ascertains the students' understanding of the topic.

he ascertains the authenticity of the document.

the survey ascertains customer satisfaction levels.

the manager ascertains the team's progress on the project.

the doctor ascertains the patient's symptoms before treatment.

the researcher ascertains the validity of the experiment.

the accountant ascertains the financial discrepancies in the report.

the software ascertains user preferences for better recommendations.