[citation needed] Contrast is often overtly marked by markers such as but or however, such as in the following examples: In the first clause, It's raining implies that the speaker knows the weather situation and so will prepare for it, while the second clause I am not taking an umbrella implies that the speaker will still get wet.
Both clauses (or discourse segments) refer to related situations, or themes, yet imply a contradiction.
It is this relationship of comparing something similar, yet different, that is believed to be typical of contrastive relations.
The same type of relationship is shown in (2), where the first sentence can be interpreted as implying that by giving a party for the new students, the hosts will serve drinks.
In morphology, 'contrast' is identified, when two linguistic elements occur in the same environment(s), and replacing one with the other creates a difference in meaning.