 There are other potential issues here as well. Sober argues that without additional very specific assumptions about the putative designer we could specify no particular value for P(e | h)—e.g., the likelihood that a designer would produce vertebrate eyes with the specific features we observe them to have: and that depending on the specific assumptions made we could come up with any value from 0 to 1 (e.g., Sober 2003, 38).