1.3.Method

The discourse analyzed was uttered by the scientific advisor in a joint project currently underway to study the optical properties of paint. RB is a scientist with international prestige in the field of optics who has been working at the Institute of Physics of the National University of Mexico (IF-UNAM) for some 28 years. He has been advising a research project at a company research center for the last 6 years. RB spends at least one day a week at this center as an advisor. He is also in contact with the research team via phone and e-mail.