Conversation:

If, as you have established, the ham is already sliced, and the bread is both sliced and buttered, why do you need the knife? To defend your sandwich?

You have to guess

The knife is mentioned in the original but for some reason steps 4 and 5 are missing from the Guide Entry.

The knife is to spread the butter on each slice of bread.

But the article clearly states the bread is already buttered

The knife is for the cutting the sandwich is it not?

unless you're the psychopath who has an uncut sandwich
hmmmmm... maybe the psychopath has an uncut sandwich because he's had his knife taken off him due to his tendency to stick the knife in people - that would make sense
but then - how would our psychopath butter the bread and cut the bologna, or whatever, to go in the sandwich without a knife?
By eck! It can't be easy being a psycopath

Is it true that the majority of you cut your sandwiches? I don't believe that I've done so since elementary school.