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Use "prober" in a sentence
"They were apparently unaware that the chief GOP prober on the Science Committee is a representative who makes Issa and some of his Republican colleagues look like Bill Nye the Science Guy when it comes to environmental issues."
"If you're looking for a prober sport, baseball and American Football, now we're talking."
"One diligent prober, Reed Larson of the University of Illinois, even equipped his 500 teen subjects with beepers so he could remind them to fill out questionnaires about how they are feeling, what they are doing and who they are with at random moments during the day."