A kernel of truth phrase
A small amount of truth in something such as a story, speech, or statement, particularly when all other elements are invented.
After asking him a few questions, the police concluded there was a kernel of truth in what he said.
After listening to a gripping narrative of her journey up the Amazon, I know there is only a kernel of truth in it.
The origin of this phrase is not clear.
Used to allude that the last force, problem or burden which is seemingly minor and small causes a person, system or organisation to collapse or fail
Her husband's violent act last night was the straw that broke the donkey's back and she left him