If Tifa and Aerith fought...

[Firo Volondé]

Wrong, my good sir. CANON agrees with Wikipedia.

Prove it.

I don't need to, because you still haven't offered any evidence that anything quoted from Wikipedia is wrong.

And still, you refuse to deny my original statement, about humans being the Cetra who stopped listening to the planet. Before you scoff at Wikipedia, please porvide some evidence as to why it's wrong.

Because it IS wrong. The cetra are not unique in their ability to listen to the planet.

In the statement you're trying to disprove, "unique ability" means that no non-Cetra in FF7 is born with the ability to listen to the Planet. Name one non-Cetra that was born with the ability to hear the Planet. Please.

Bugenhagen studied the Planet for years in order to be able to hear the Planet. By the way, Holy only called one person in the whole game, and that was Aerith. And by a startling coincidence, Aerith is the only Cetra left. Why didn't it call to Bugenhagen?

He wasn't wearing it in his hair.

Exactly. And how did it get in Aeris' hair? Ifalna gave it to her. Why not give it to someone like Bugenhagen? Because she knew that only Cetra could use it.

Suddenly, Cloud saw Sephiroth kill two people with his Masamune. We watch a movie of Sephiroth walking away with flames all over the place. Cloud then proceeds to the Mako Reactor. He saw Tifa's father's dead.
Tifa: Papa... Sephiroth!? Sephiroth did this to you, didn't he!?
Sephiroth... SOLDIER... Mako Reactors... Shinra... Everything! I hate
them all!
Tifa took the Masamune and ran. As Cloud head to the reactor section...
Sephiroth: Mother, I'm here to see you. Please, open this door.
Tifa: How could you do that to papa and all the townspeople?
Tifa attempted to slash Sephiroth with the Masamune but Sephiroth took the sword from her and slashed her. Then Sephiroth went inside the room with Jenova. Cloud helped the wounded Tifa.

Masamune is a sword. Only Sephiroth could wield it meant he was the only one strong enough to actually use it effectively. Anyone could pick it up, but is would be too big to be useful. Just like anybody could hold the White Materia, but Aerith was the only one who could pray to the Planet and unlock Holy. Note that Sephiroth, unarmed, ambushed by Tifa, took the Masamune from Tifa without blinking. Furthermore, that whole sequence is based on Cloud's memories that Zack actually witnessed. It may not even be 100% accurate.

Doesn't matter. LO is a third person omniscient. It is canon.
I'd also like to see your source on 'Only Sephiroth can wield it.' This should be good. Especially since with a name like Masamune, it was almost certainly forged by the wutai, and not for Sephiroth.
By the way, how is any of this relevant to the point- and not my analogy- of battle equipability relevant to plot usability?

My source is the people you mentioned in this quote:

Do I have to repeat my request that you explain how it not being battle equippable means no one can use it? For the longest time, people claimed only Sephiroth could use Masamune, when the canon evidence of Tifa picking it up and swinging it at him is right in front of them?

Also, the instruction manual says "His giant sword which only he can handle". Masamune is the name of his sword because almost every Final Fantasy game has a sword named Masamune. It is not meant to have a history behind it. If I'm wrong, and if it was forged by the wutai, most likely Shinra authorised the sword for Sephiroth's use. It is not relevant, you brought up the Masamune using the above statement.

Sephiroth, and only Sephiroth, could use Black Materia because he spent years in the Lifestream, and so gained all the knowledge of the Ancients. He would be able to use Holy as well, and Aerith could use Meteor, but why would they? There's your evidence. And for the record, it would not make Cetra stupid, but the Planet, since it created the White and Black Materia.

Actually, he learned how to use the black materia by reading the instructions inside the temple of the ancients. Though even if your assertion here is true (which actually contains no evidence, despite you saying it does), it bears out MY argument, that it is the knowledge of the use, and nothing else, that allows one to use Materia.
And the Planet formed an intricate hewn temple temple staffed by the lingering conciousnesses of dead Cetra devoted to staffing the place. Riiiight. Now pull the other one. It's got bells on.

Mr. Game Script?

Cloud picked up the Black Materia.
Cloud: Mmm? Can you guys use it?
Aeris: Nope, we can't use it right now. You need great spiritual power
to use it.
Cloud: You mean lots of Spiritual energy?
Aeris: That's right. One person's power alone won't do it. Somewhere
special. Where there's plenty of the Planet's energy... Oh yeah! The
Promised Land!!
Cloud: The Promised Land!! No, but...
Aeris: Sephiroth is different. He's not an Ancient.
Cloud: He shouldn't be able to find the Promised Land.
Sephiroth: ...Ah, but I have. I'm far superior to the Ancients. I
became a traveler of the Lifestream and gained the knowledge and wisdom of the Ancients. And soon, I will create the future.

Two things I worked out from that passage:
1) The Black Materia can't be used unless you have great Spiritual energy. No one person has enough. You need access to plenty of the planet's energy, a.k.a. the Lifestream.
2) Sephiroth gained the knowledge and wisdom of the Ancients from travelling the Lifestream. That is when he started his plan to use the Black Materia, which was what I meant to say. Note my post never says he learned to use it in the Lifestream.

Except for White and Black Materia. They are very different to normal Materia. Do some research.

Show me some evidence, instead. You claim Meteor and Holy require special activation. Prove it.

I believe it was you who said:

Disagree. Holy was using Aerith to be cast, Aerith just went along with it.

Name one other Materia that does that? I'd call that special activation.

Because Aerith knew nothing of Holy until she got to City of the Ancients, she said that because the White Materia, when calling to her, told her that. Aerith may not be infallible, but the Planet is.

But she wasn't at the city of the ancients when she sent the message. So she's not been told that information yet, by your argument.

Yes she was. She sent that message, according to Cloud's words, "after I handed the Black Materia to Sephiroth", so even if she wasn't there, she was still being led by WM.