Pensieve = Security Camera? / the prank

[mnaper2001]

No: HPFGUIDX 102827

> > Alice:
> > But this would mean that having a Pensieve would be like having 
360
> > vision and senses all the time - albeit only in retrospect. 
> > Wouldn't people USE that a lot more? Just one idea: the examiner 
could 
> > look into his Pensieve after the exam and check whether anybody 
had 
> > been cheating, talking etc. 

 
Valky:

> This is a boon for the argument that the pensieve is not objective. 
> 
> Truly if it were so would the Wizard World use it for these things.
> 

Ally:

But whose to say everyone has a pensieve?  Only DD appears to have 
one.  Just like not everyone has a time turner or a Marauder's Map or 
an invisibility cloak.

The fact that DD said its useful to gain perspective on an event and 
the fact that it showed things Snape apparently wasn't consciously 
aware of when they were happening (eg the Marauders conversation 
about werewolves) makes me think it takes all of the conscious and 
subconscious aspects of the memory and puts them all on display for 
you.