(Playing tongue-in-cheek devil’s advocate) In order to lose weight, a body needs to be undernourished in relation to the minimum required to maintain that weight. Being undernourished at a non-starvation level produces hunger drive. I doubt any of the humans who decided he needs to lose weight speak fluent cat, so he didn’t have any say or insight into what’s being done to him. As such, from his perspective, he -hasn’t- been fed enough, and doesn’t have a reason for being hungry. So this cat should not be called a liar. He’s out there bravely sharing his truth with the world. He should be applauded and then fed.