I would insert "at least some" before the "given" to avoid the inadvertent creation of a strawman related to the finitude of any inquiry carried out by the finite agent, man. Some supersets of Intelligent Design (e.g. theism) would put "all" there. But that question is not in scope.
Intelligent Design: A hypothesis wherein given features of life v non-life are explained by an intelligent cause, not an undirected process such as natural selection.
HiTech RedNeck says: I would insert "at least some" before the "given" to avoid the inadvertent creation of a strawman related to the finitude of any inquiry carried out by the finite agent, man.
I'll have to decline. The qualifier "at least some" is redundant, and "the finitude of any inquiry carried out by the finite agent" is irrelevant to our purposes.
The given features can be one feature, a set of features, or all features - any of these options being quite consistent with the definition we've specified.
So, with your caveat duly noted for the record, the task at hand is to define "panspermia"..