Medical Researcher: Among adults over 75, 62 percent of those who suffered three or more falls in the last 12 months walked unsteadily because of joint stiffness and age-related muscle loss, not because of neurological decline.
Therefore, clinicians should no longer regard a history of frequent falls as evidence that neurological degeneration is beginning.
The researcher's argument is most vulnerable to criticism on which of the following grounds?
(A) Assumes proving many falls have another cause shows falls never indicate neurological decline.
The researcher's argument is flawed since he assumes many falls (62%) have another cause shows falls never indicate neurological decline (may be 38%), therefore, he suggests that clinicians should no longer regard a history of frequent falls as evidence that neurological degeneration is beginning. There is over generalisation in this case.
Correct
(B) Ignores that stiff joints and early neurological decline could coexist in some patients.
Co-existence of multiple causes is not the primary issue in the argument. This somewhat weakens the argument, but the argument is more concerned about primary or main cause of the frequent falls.
Incorrect
(C) Takes for granted that “three or more falls” captures every clinically meaningful fall pattern.
The statement is irrelevant since the argument defines three or more falls as the primary concern in adults over 75
Incorrect
(D) Presumes the 62 percent figure is inherently large enough to overturn the diagnostic link.
This is not the primary concern. Primary concern is about eliminating the possibility of neurological degeneration considering majority of non neurological degeneration causes. A is better
Incorrect
(E) Overlooks that participants may have been selected precisely because of musculoskeletal problems.
There may be a possibility of sampling bias, primary concern is about finding the vulnerability in the researcher's argument without contesting the truth in the statements provided.
Incorrect
IMO A