Detecting a sent without it being present is the gift of clairescence. The faint aroma of a familiar smell, with no good reason for it being there, can be a very powerful message. Smell is widely regarded as one of the most powerful of all the 5 senses. This is because studies have shown that odours trigger strong reactions of brain chemistry. An example of this gift would be the smell of alcohol when no-one had been drinking or even the smell of mums Sunday roast with all the aromas that would make up that smell. This ability is characterised by the use of the words “I can smell….”