‘Cogito ergo sum’, or ‘I think, therefore I am’, is probably the most famous example of the use of ‘therefore’. It demonstrates that there needs to be a logical connection between the initial data and the conclusion. I see a lot of essays that try to sound more convincing by implying a causal link exists when there is, at best, a correlation. Just check that the data really does prove that the conclusion (or deducation based on the data) is actually a logical extrapolation: does the data really prove what you are saying? If not then never use the word ‘therefore’. I hope this helps a few people.

Don’t worry, I’ll be back to telling jokes on Monday, see you then!