Lawyer: A body of circumstantial evidence is like a rope, and each item of evidence is like a strand of that rope. Just as additional pieces of circumstantial evidence strengthen the body of evidence, adding strands to the rope strengthens the rope. And if one strand breaks, the rope is not broken nor is its strength much diminished. Thus, even if a few items of a body of circumstantial evidence are discredited, the overall body of evidence retains its basic strength. The reasoning in the lawyer's argument is most vulnerable to criticism on the grounds that the argument ['takes for granted that no items in a body of circumstantial evidence are significantly more critical to the strength of the evidence than other items in that body', 'fails to consider the possibility that if many items in a body of circumstantial evidence were discredited, the overall body of evidence would be discredited', 'presumes, without providing justification, that the strength of a body of evidence is less than the sum of the strengths of the parts of that body', 'offers an analogy in support of a conclusion without indicating whether the two types of things compared share any similarities']