- Plastic is an electrical insulator
- Plastic tape is made of plastic
- Therefore, plastic tape is an electrical insulator

- Plastic tape is an electrical insulator
- An electrical insulator prevents the flow of electricity
- Therefore, plastic tape will prevent the flow of electricity

So, plastic tape will prevent the flow of electricity
[Question]Which of the following would make the best insulator against the flow of electricity?
[Context]- Plastic is an electrical insulator 
- Plastic tape is made of plastic 
- An electrical insulator prevents the flow of electricity