This question involved some of the complicated plots and character settings in Journey to the West, which required more specific background to answer. However, he could provide some ideas on some of the possible explanations. The Tathagata Buddha was a fictional character in Journey to the West. His identity and true abilities were unknown. Therefore, the answer to the question of whether he was the biggest liar of the Journey to the West depended on the reader's understanding of the Buddha. Some people might think that the Buddha was a real Buddhist master, while others might think that he was a liar or a fake god. The relationship between the Tathagata Buddha and other Buddhist characters in Journey to the West was also complicated. In Journey to the West, he had a close relationship with Sun Wukong, Zhu Bajie and Monk Sand, but his attitude towards other Buddhist characters was also different. Sometimes he seemed to support these characters, and sometimes he showed distrust and vigilance. Therefore, the readers 'attitude towards Buddha would also affect whether he was the biggest liar in the Journey to the West. Finally, there were some contradictions and suspicions in the plot of the Tathagata Buddha in Journey to the West. For example, in Journey to the West, he once created a Buddha's Palm but was unable to use it to defeat other demons. In addition, he also seemed to have some unfair behavior when dealing with some Buddhist characters, such as contempt and disrespect for some high-level Buddhist practitioners or tolerance and indulgence towards other demons. These plots may also cause readers to doubt the true ability of the Buddha. To sum up, the answer to the question of whether the Buddha was the biggest liar of the Journey to the West depended on the reader's understanding of the Buddha, the plot and character setting of Journey to the West, and the understanding and understanding of Buddhism.