Indefinite description

Let's take an example, "I met a man". In this sentence we cannot refer to a specific individual, but nevertheless it conveys about a 'man' which is general in terms. Here we do not find any specific individual we find in the propositions, let's say 'I met Mr. Jack' or 'I met Mr. John'. Thus, here only concept enters into the sentence. Similar to these a few sentences are; 'I met a unicorn' or 'I met a winged serpent'. In these sentences though there are no such objects exist as 'unicorn' and 'winged serpent', yet we can have the concept of unicorn as well as winged serpent.

That my assertion of 'I met a man' does not imply 'I met Mr. John', even if I actually met Mr. John, is evident from the fact that 'I met a man and I did not meet Mr. John' is not a contradictory statement. 'I met Mr. John and I did not meet Mr. John' is a contradictory statement.

Definite description is different from indefinite description. Unlike indefinite description, definite description refers to a definite object or a specific individual.