In the uk at least truth is not defense againts defamation. Beware if you live there.
The truth is still an absolute defense against defamation in the UK, just like it is in the US, but the difference is who the burden of proof is on.
In the US, it is up to the person suing for defamation to prove the statements were false AND that the person knew them to be false when they said them (or should have known they were false).
In the UK, for someone to use the truth as an absolute defense, they have to prove the statements were true, which is often not very easy.
“It is a defence for defamation to show the imputation in the statement complained of is substantially true.”
That said, your comment isn’t a summary of the article at all.