ABSTRACT
If we allow gay marriage today, then it is only a matter of time before we will have gay adoption. This reasoning, heard in slightly different versions in two early 1990s Norwegian parliamentary debates on same-sex partnership, is an example of slippery slope logic: if we now accept X, in itself harmless or at least not so bad, then what will inevitably follow in the future is Y, something that we all (or most of us) think is bad.
