human
Is there a way to tell if a berry is contaminated?
assistant
Yes, there are several ways to determine whether or not a berry is contaminated. One of the most common methods is to inspect the berry for any signs of mold or rot. Another method is to smell the berry and check for off-putting odors. A third option is to taste the berry and see if it tastes bitter or sour. Finally, you can use a refractometer to measure the sugar content in the berry, as higher levels of sugar indicate that the berry has been exposed to contamination.