A ydym yn gwybod mai dweud celwydd mae rhywun? Y cyn-blismon Alun Hughes sydd â'r atebion. Can we tell when someone is lying? Retired police inspector Alun Hughes has the answers. Show more
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A ydym yn gwybod mai dweud celwydd mae rhywun? Y cyn-blismon Alun Hughes sydd â'r atebion. Can we tell when someone is lying? Retired police inspector Alun Hughes has the answers. Show more