Decisions T 326/87 Polyamide compositions/DU PONT (OJ EPO 1992, 522), T 173/89 (unpublished), T 117/86 Costs/FILMTEC (OJ EPO 1989, 401) and T 182/89 (OJ EPO 1991, 391).Late-filed evidence, documents and other matter can be rejected by the Boards of Appeal on the ground of their irrelevance, that is to say on the basis that they are no more weighty or cogent than matter which is already in th