“It's mashma from the story that the criminal was never caught.” (Weiser)

“The Gemara is mashma that the Earth is round.” (Weiser)

“He was mashma that he would leave right away, but you can check for his car.” (Weiser)

"First: The sugyah of Sheliah L’ravah (Bava Metzia 96a) is mashma that a sheliah with a very limited scope, so long as it’s a normal usage (according to Rashi; and even abnormal, within the Rambam’s mehalech), constitutes a full-fledged sheilah." (source)