The stone is 143.5 kg, so he should have bigger arms.
That stone is 22.6 stones
is it clear his dad wrote it? Isn't that how surnames worked in the day? Like now it would be "John Smithson could lift this rock above his head" and anyone could have writtten it, including john smithson
This meme doesn't imply his dad wrote it, just that he was there.
The stone is 143.5 kg, so he should have bigger arms.
That stone is 22.6 stones