Slippery slope argument

A slippery slope argument says that allowing one step will lead, through a chain of further steps, to an outcome nobody wants.

Updated 12 October 2026 (1 minute read)

Summary

  • It is common in debates on assisted dying, where opponents fear the criteria would widen over time.
  • It also appears in debates on the genetic selection of embryos.
  • Its strength depends on evidence that each step would really follow from the last.
  • Supporters of a change usually answer that the law can draw a line and hold it.

Interview questions

  • What is a slippery slope argument?
  • Is it a good argument against legalising assisted dying?
  • Embryos can be screened for serious genetic disease. Where would you draw the line?

Practise answering these with a mentor

Our interview preparation has you answer questions like these out loud, with feedback on each answer.

More NHS hot topics, medical ethics case studies and medical school interview questions are in AlphaMED Resources, which we add to and update through the application cycle.