Origin-of-life science still contains important unanswered questions. Critics argue that inferring design from those unanswered questions simply places God or an intelligent cause into gaps in present scientific knowledge.
History provides many examples in which phenomena once unexplained later received natural explanations. Future research may likewise resolve problems that currently appear difficult.
This objection goes to the method of Intelligent Design reasoning.
If the argument amounts only to "science does not currently know, therefore design," then every scientific advance that closes a gap would weaken the argument.
A lack of explanation by itself does not establish Intelligent Design.
For that reason, the investigation should not infer design merely from the fact that origin-of-life research contains unresolved problems. Those problems identify subjects for further investigation.
The positive Intelligent Design argument is different. Design advocates argue that certain properties of living systems — particularly functionally organized information — resemble effects that intelligent agents are independently known to produce. They therefore propose intelligent causation as an inference from observed effects to a known kind of cause.
Whether that inference succeeds must be evaluated on its own merits. It requires more than pointing to what science has not yet explained.
Future natural explanations should therefore be welcomed and examined rather than treated as threats. They help determine which phenomena genuinely require further explanation and which apparent difficulties resulted only from incomplete knowledge.
Can Intelligent Design identify positive evidence for intelligent causation that remains significant even as natural origin-of-life mechanisms become better understood?