Karnataka Chief Minister Basavaraj Bommai today said the Congress's "40 per cent commission" charge against his government is "a figment of imagination" and challenged his critics to produce "one solid case" of corruption. "These are still allegations. I am challenging all my adversaries - come out with one case, a solid case against our government and we will do the perfect inquiry. We won't spare anybody. 40% is just a figment of imagination," Mr Bommai told NDTV in Shiggaon, where he filed his nomination papers to contest the May 10 election.