airing, amassing evidence, analysis, buzz session, canvassing, close inquiry, colloquium, conference, consideration, debate, debating, deliberation, delving, department of investigation, detection, detective work, dialectic, dialogue, discussion, enquiry, examination, exchange of views, exhaustive study, exploration, forum, hearing, indagation, inquest, inquiry, inquisition, interrogation, investigative bureau, joint discussion, legislative investigation, legwork, logical analysis, logical discussion, observation, observing, open discussion, open forum, panel discussion, perscrutation, probe, probing, quest, questioning, rap, rap session, research, review, scrutiny, search, seminar, sifting, sleuthing, sounding, study, survey, surveying, symposium, town meeting, treatment, ventilation, witch-hunt