How does toph know when someone is lying?

Toph Beifong, the blind earthbending master from Avatar: The Last Airbender, doesn't detect lies through any magical or supernatural ability. Instead, she uses her earthbending and heightened senses to identify when someone is lying.

Here's how she does it:

* Earthbending: Toph can sense the vibrations of the earth, including subtle changes in the ground beneath someone's feet. These vibrations can reveal tremors caused by nervousness, discomfort, or other physical cues that betray a liar.

* Heightened Senses: Toph's blindness has allowed her to develop other senses to an extraordinary degree. She can hear subtle changes in a person's voice, breathing patterns, and even the slightest shifts in their posture or muscle movements. These minute changes, often undetectable to others, can signal deception.

In essence, Toph uses her unique abilities to pick up on the physical signs of lying, which most people are unaware of or unable to control. She is essentially a highly skilled human lie detector, utilizing earthbending and her honed senses to expose the truth.