Comparing 45 to 50 is subjective.  25 to 75 only a fool could think there is no difference.  Passing a test means nothing.  All of the old ladies that confused the break pedal with the gas did pass a test that said it was OK for them to drive into the local coffee shop.  Don't forget that I am arguing the age in general and not specific to this incident or pilot.  It was a response to CAP who said your reflexes are not the same at 70+ only if you let them.
YOu cant argue general without including everyone in your group or you just defeat your own argument.  Age is not the criteria I hate to be the one to tell you.   Its amount of reflexes or x,y,z. A 25 year old would get rejected the same as a 26 year old or a 70 year old if they did have x qualification.
There are plenty of teenagers that passed the driving test that drive dads car thru the garage ..... 

I dont care what the content is the context is in error.   Its obvious that age does not properly address the issue.
Age = x is not known to be true.   x=x is known to be true. 
x is 70 and has slower reflexis than y that is 25.        x is 70 therefore has slower reflexes than y that is 25
One is a logical error when used in a argument.
One the quantity is not known  

 and thats the very question that needs answered. 

  Its called begging the question. 
 
 