Should McLaren have appealed to the FIA's International Court of Appeal (ICA) the stewards' decision, post-race at Interlagos, that BMW Sauber and Williams had breached the FIA's fuel temperature regulation? That is a matter for sportsmen and, to some extent, for chemists.
Whether McLaren can appeal the stewards' decision is, unfortunately, a matter for lawyers, with whom Formula One is increasingly populated these days.
According to McLaren F1 CEO Martin Whitmarsh, the rationale for the appeal is as follows: "We were surprised at and don't really understand the stewards' decision ... Therefore, we feel that if we hadn't lodged our intention to appeal we would surely have been criticized by fans and Formula One insiders alike for not supporting our drivers' best interests."