Consider this rule-utilitarian argument against legalizing euthanasia: Passing a law to permit active voluntary euthanasia would inevitably lead to abuses such as more frequent use of non voluntary euthanasia and unnecessary killing; therefore, no such law should be passed. Such an argument is characterized as _________.

'Slippery slope' is demonstrated as the argument that is logically flawed as it offers a very small or minor event leading to a chain of major and significant events that often creates a ludicrous effect.

As per the question, the given argument could be characterized as 'slippery slope' as a very minor first step 'Passing a law to permit active voluntary euthanasia' would lead to extensive consequences 'abuses..more frequent use of non voluntary euthanasia and unnecessary killing'. Such an argument fails to ignore the possibility of upcoming consequences(due to the use of a small action leading to a significant effect) that creates an incongruity in the argument.