At the top of each post, the post heading actually has the URL sitting behind it.
To link to earlier posts, people can right-click, copy this URL, and put it in their posts. It's a bit more reliable than post numbering which would become disjointed if posts are deleted (either by the user or a moderator).
"Do not force others, including children, by any means whatsoever, to adopt your views, whether by authority, threat, money, propaganda, or even education." - Ven. Thich Nhat Hanh
"The uprooting of identity is seen by the noble ones as pleasurable; but this contradicts what the whole world sees." (Snp 3.12)
"To argue with a person who has renounced the use of reason is like administering medicine to the dead" - Thomas Paine