The mirror doesn't know anything. Mirrors reflect the light that falls on its surface. This includes the light bouncing off a person as well everything in room.
As to why the girl is visible; it can be explained by the law of reflection:
en.wikipedia.org/wiki/Reflectio…x.com/i/grok/share/6…
You can bend the air out of a motherfucker's lungs.
You can bend the minerals in a motherfucker's bones.
You can bend the piss and blood in a motherfucker's organs.
There ain't no fire in a motherfucker.
Zoomers are booing the fat black women and hideous androgynous girls being pigeonholed into every modern movie for DEI reasons.
Another Minecraft W.
The feminist shrilly screaming out "shut up" makes this video perfect.
I can't keep this knowledge to myself anymore.
EVERY SINGLE ROCK on The Covenant is the same rock.
EVERY ONE. ALL OF THEM. THERE IS ONE SINGLE ROCK ON THE COVENANT.
NOT TWO, NOT THREE, JUST ONE.
IT'S JUST ONE ROCK ROTATED, SCALED, AND MOVED AROUND.
Vampires have a long list of stupid weaknesses. Imagine not being able to enter Walmart until an employee says you can, and then having to stop and count the Skittles someone spilled.
Since everyone's talking about the leaked official Pokémon sex lore, I just thought I would remind you all that Disney and Warner Bros. have vaults full of porn of their characters drawn by their official artists for some reason.