(… فَمَنْ حَاجَّكَ ) (Then whoever argues with you about it …): about Jesus being born to a virgin mother.
(… مِن بَعْدِ مَا جَاءَكَ مِنَ الْعِلْمِ …) (…after knowledge has come to you ): The issues here is not about knowledge or logic but a matter of denying and disbelieving in the right.
( فَقُلْ تَعَالَوْا نَدْعُ أَبْنَاءَنَا وَأَبْنَاءَكُمْ وَنِسَاءَنَا وَنِسَاءَكُمْ وَأَنفُسَنَا وَأَنفُسَكُمْ ثُمَّ نَبْتَهِلْ فَنَجْعَل لَّعْنَتَ اللَّهِ عَلَى الْكَاذِبِينَ … ) (…say, “Come, let us call our sons and your sons, our women and your women, ourselves and yourselves, then supplicate earnestly [together] and invoke the curse of Allah upon the liars [among us].”): This verse is called the verse of (Al-Mubahala – the earnest supplication) which is meant for supplication to have the liars cursed by the Almighty.
The question here, anyhow, is why the women and sons are called? This is because one’s family is the dearest to them. So, whoever has spoken about Jesus (PBUH) contrary to what the Almighty says about him that he (Jesus) is a slave, messenger of the Almighty and His word sent to Virgin Mary, is called for the earnest supplication to have the liars cursed by the Almighty.