Contradictions and factual errors are closely related, ..... no.

Oh my, some people post complete rubbish and misinformation on the web.

"Contradictions and factual errors are closely related, "

Contradiction:
1:  act or an instance of contradicting
2
   a :  a proposition, statement, or phrase that asserts or implies both the truth and falsity of something
   b :  a statement or phrase whose parts contradict each other <a round square is a contradiction in terms>
3
   a :  logical incongruity

   b :  a situation in which inherent factors, actions, or propositions are inconsistent or contrary to one another

Factual (error)
1:  of or relating to facts <a factual error>
2:  restricted to or based on fact <a factual statement>

For this statement to be true, it would not be a factual error but a factual statement that is incorrect.

Thanks to the Mirriam Webster dictionary for those terms.

http://www.merriam-webster.com/dictionary/contradiction

http://www.merriam-webster.com/dictionary/factual