It's a conspiracy by the POPs (Protection Of Punctuation) organisation. This has been set up to help prevent the misuse of of the much maligned apostrophe, especially the "greengrocer's apostrophe" used by people who think that every word that ends with an "s", including plurals, requires that "s" to be preceded by "'".
The minister for education said the teacher is a fool if he thinks that punctuation is not necessary.
PC Advisor have changed to code page for this forum to ISO-8859-1, which apparently does not support the smart quotes ANSI characters 145 146 147 and 148. ? ? ? ? If you really want them you can search and replace with & #145, & #146, & #147, & #148 (but removing the spaces). That should give you and or and. Similarly for any other ANSI character: