This is a typical logical gap based question. Letsunderstand.
Premises
Protein deposits are found in both groups (suffer from alzheimer and those who don't).
Elderly with alzheimer have lesions in brain caused due to protein deposits as revealed byautopsy
Conclusion
Eventually everyone will get Alzheimers. The assumption or the logical gap is that brain lesions lead to alzheimer and eventually the protein deposits will cause those leading everyone to get alzheimers.
Now, to undermine the above
...
Premises
Protein deposits are found in both groups (suffer from alzheimer and those who don't).
Elderly with alzheimer have lesions in brain caused due to protein deposits as revealed byautopsy
Conclusion
Eventually everyone will get Alzheimers. The assumption or the logical gap is that brain lesions lead to alzheimer and eventually the protein deposits will cause those leading everyone to get alzheimers.
Now, to undermine the above
...
