Dishonesty -

Dishonesty intended for personal gain, to avoid punishment, or to enhance one's image.

To maintain a positive self-image, people often rationalize their lies (e.g., "everyone does it"), which reduces internal discomfort and facilitates future dishonesty. Academic Honesty : Arts, Sciences & Engineering dishonesty

Functional MRI scans show that lying increases activity in the prefrontal cortex—the area responsible for decision-making and problem-solving—meaning it is more taxing than telling the truth. Dishonesty intended for personal gain, to avoid punishment,

Dishonesty exists on a spectrum, from minor social lubricants to life-altering frauds: Dishonesty intended for personal gain

The choice to lie involves a mental "multitasking" where the brain must suppress the truth while fabricating and maintaining a believable alternative.