Premise: A lamington is an Australian cake, made from squares of sponge cake coated in an outer layer of chocolate (or sometimes raspberry) sauce and rolled in desiccated coconut. The thin mixture is absorbed into the outside of the sponge cake and left to set, giving the cake a distinctive texture. A common variation has a layer of cream or strawberry jam between two lamington halves.
Hypothesis: The squares of sponge cake are two inches thick.