Question about Pensieve memories

[Debi]

No: HPFGUIDX 186018

<snip>
> Pippin:
> But there must be some point to Snape storing his memories in the Pensieve and replacing them afterwards. Perhaps while  memories are in the pensieve, one can still recall the facts of an event, but can't picture it in the mind  -- and neither could an invading legilimens. 
> 

You saying about the facts of an event reminded me about something Dumbledore said to Harry when he discovered the Pensieve in Goblet of Fire:
"I use the Pensieve. One simply siphons the excess thoughts from one's mind, pours them into the basin, and examines them at one's leisure. It becomes easier to spot patterns and links, you understand, when they are in this form."

Debi