Answer
See work step by step.
Work Step by Step
For a charge to exist it must follow the two following properties:
1.) It must attract all dissimilar charges.
2.) It must repel like charges.
We can conduct an experiment to see whether charge X attracts both glass and plastic charges and repels other X charges.
If, charge X attracts either glass or plastic BUT NOT both, then charge X cannot be considered a charge.
If, charge X attracts glass, plastic, and other X charges, the charge X cannot be considered a charge.
If, charge X repels glass, plastic, and other X charges, then charge X cannot be considered a charge.
If, charge X repels glass and plastic, but attracts other X charges, then charge X cannot be considered a charge.
If, charge X repels either glass or plastic BUT NOT both, then charge X cannot be considered a charge.
If, charge X attracts both glass and plastic, and repels other X charges, then charge X CAN be considered a charge.
