While there is no definitive evidence of life in ALH84001, that doesn’t mean the interpretation is wrong. We simply do not have enough data to contradict the original hypothesis that fossil life is present. As Everett Gibson from the Johnson Space Center said in 2006, on the twentieth anniversary of the announcement, “Despite whether you are a believer of the hypothesis or not, it has clearly been the guiding idea for the development of the new interdisciplinary field of astrobiology.”

