The court must consider the pleadings and supporting or opposing affidavits submitted by the parties." Day v. Dodge, supra, 67 Conn.L.Rptr. 753. "The legal idea of probable cause is a bona fide belief in the existence of the facts essential under the law for the action and such as would warrant a man of ordinary caution, prudence and judgment, under the circumstances, in entertaining it ... Probable cause is a flexible common sense standard.