Despite the lack of a plausible explanation for a process by which life arises from non-life, evolutionists cling to the theory of spontaneous generation because they don't allow other options to be considered. Norm Geisler explains:
"Spontaneous generation is what critics of evolution call a 'just-so' story. Evolutionists provide no evidence to support spontaneous generation. It isn’t supported by empirical observation or forensic science principles. It’s 'just-so' because life exists, and since intelligent causes are ruled out in advance, there can be no other possible explanation."