Is a chicken still good if it was half cooked in crock pot and then left out night before?

No, a chicken that was half-cooked in a crock pot and left out overnight is not safe to eat.

Here's why:

* Bacteria Growth: Leaving cooked chicken at room temperature for an extended period allows bacteria to multiply rapidly. This can lead to food poisoning, even if the chicken was partially cooked.

* Temperature Danger Zone: The temperature range between 40°F and 140°F is known as the "danger zone" for bacterial growth. Leaving chicken out overnight falls squarely within this zone.

* No Way to Ensure Safety: Even if the chicken was cooked to a safe internal temperature initially, it's impossible to guarantee that it hasn't become contaminated during its time at room temperature.

It's better to err on the side of caution and discard any food left out at room temperature for more than two hours.

If you're unsure about the safety of any food, it's always best to throw it away. Food poisoning can cause serious illness, and it's not worth the risk.