In a mathematical proof or a syllogism, a conclusion is a statement that is the logical consequence of preceding statements. It can also be at the end of a speech. It is based on facts and evidences that have been gathered together from an article or paper.
In both formal and informal logic, a main contention is a thought which is capable of being either true or false and is usually the most controversial proposition being argued for. In reasoning, a main contention is represented by the top of an argument map, with all supporting and objecting premises which bear upon it placed underneath. A main contention is given a different order and is placed at the start of an argument and not at the end.
The concluding section of a discourse, often called peroration, is normally intended to be a summary of the topic and an appeal to the audience. Such conclusions occur in both written and verbal discourses.