"slightest evidence" is a grammatically correct and commonly used phrase in written English.
It can be used in various contexts and is typically used to describe a small amount or hint of evidence. Example sentence: As the detective searched the crime scene, he couldn't find the slightest evidence to link the suspect to the murder.
Discard any areas showing even the slightest evidence of spoilage.
Where is the slightest evidence of this magical transformation?
There's not the slightest evidence that Americans want laxer environmental laws.
From my lowly perch, I never saw the slightest evidence of boorishness or the rest.
Finally, the editorial describes Israel's prime minister as a "master manipulator" without adducing the slightest evidence to support this charge.
Not the slightest evidence was introduced to show that eighter Bridges or the Communist Party seriously and imminently threatens to uproot the Government by force or violence".
There is slighter evidence of an Indian influence in vocabulary, but there is no trace of Hinduism in Malagasy culture.
Over all, the scientists determined, the effectiveness of zinc lozenges "has yet to be established," while there was some slight evidence for zinc nasal gels.
The man who, in all likelihood, actually cracked the porcelain code for the Germans (some slight evidence exists that the English got there first) was Ehrenfried Walther von Tschirnhaus, a gifted mathematician, physicist, physician, and philosopher.
Furthermore, there is only slight evidence that rising energy prices have caused companies to charge more for other goods, as happened during the oil shocks of the 1970's.
There is some slight evidence for the latter theory in that Mr. Romney performed slightly worse in interviews that Public Policy Polling conducted on Sunday, receiving 18 percent of the vote to the 21 percent he received on Saturday.
