Does 'In addition, Dublin Tourism has devised and signposted three self-guided walking tours of the city, which you can follow using the booklets provided.' provide a contradiction to the established premise 'There are several self-guided tours of Dublin for tourists to choose from.'
In addition, Dublin Tourism has devised and signposted three self-guided walking tours of the city, which you can follow using the booklets provided.###There are several self-guided tours of Dublin for tourists to choose from.