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Use "simple-hearted" in a sentence
"The simple-hearted shepherd asked us what we were going to do with it and our godbrother answered through clenched teeth: 'We're going to chuck it in the sea, to see if it floats!'"
"A shameless minority wants to impose its will to the majority, and to achieve this goal they manipulate simple-hearted people who voted for Mousavi."
"The irony here is that the anchorman is sincere and simple-hearted in his message of friendship with the US."