Depending on how much one's willing to stretch that argument, they can also point out that all known life is digital.
Human genome is, effectively, a historical digital record (Nature, DOI: 10.1038/nature10231).
Human genome is, effectively, a historical digital record (Nature, DOI: 10.1038/nature10231).
Many aspects of life, however, are analog. Magnesium concentrations, membrane polarizations, molecule orientations, temperature, and so on.