In an answer to another question, [about whether you could see someone else's desires in the Mirror of Erised][1], the author of the answer suggested/asked with an implication that Tom in the diary could let people view memories that were false or manipulated. **Does anyone know if it is possible?**  

It will matter a lot in my fan-fiction.


  [1]: https://scifi.stackexchange.com/q/169368/89924