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a kernel of truth

A singular element of truth or wisdom within a greater story, narrative, speech, or claim, especially when most or all other elements are fictitious or of questionable veracity. I think the governor's speech is a bunch of hogwash by and large, but there is a kernel of truth in what he said about the need for lower taxes.
See also: kernel, of, truth

He that would eat the kernel must crack the nut.

Prov. You have to work if you want to get anything good. If you want to be a good pianist, you have to practice every day. He that would eat the kernel must crack the nut.
See also: crack, eat, he, kernel, must, nut
References in periodicals archive ?
Some researchers proposed syntactic and semantic kernels for text classification [23] [16] [28].
Popcorn Spritzer pairs nicely with Kernel Season's Premium Raw Kernel Popping Corn.
Those popcorn varieties with the highest degree of crystallinity yielded the fewest unpopped kernels, the Purdue team reports in a forthcoming Biomacromolecules.
Future LynuxWorks UML versions will allow developers to port and virtualize the Linux kernel onto other OSes and provide a completely authentic Linux environment to run any Linux executable.
ice kernels are randomly placed on background in one layer for image acquisition.
Freshness in corn equates to staying cool; warmth hastens the conversion of sugars to starch in the kernels.
All of the larvae survived when provided with a diet of all broken corn kernels, 81 percent survived on a diet that contained 5 percent broken kernels, and 28 percent survived on a diet that contained only whole corn kernels.
Popcorn kernels have been found with other evidence of human habitation that have been dated at over 5,600 years of age.
The MC gradients cause differential stress inside the kernel, which, if sufficiently large, causes the kernel to fissure.
They all have moisture, a starchy kernel, and a hard overcoating, or hull.
Nelsen notes that XL6 seed costs about $50 an acre more and that the grain produced averages a discount of $60 an acre at the mill because of broken kernels.
Part II explores supervised image classification including Super Vector Machines (SVMs), kernel discriminant analysis, multi-temporal image classification, target detection with kernels, and Support Vector Data Description (SVDD) algorithms for anomaly detection.
Using the balance, find the mass of 50 unpopped kernels.
This blanching kills enzymes in both kernels and cob that otherwise gradually destroy corn's flavor molecules.