In the 50th anniversary episode when the 10th Doctor saw a time rip, a person came out of it then this conversation happens:

ELIZABETH: Who is this man?

 

DOCTOR 10: That's just what I was wondering.

 

DOCTOR: Oh, that is skinny. That is proper skinny. I've never seen it from the outside. It's like a special effect. Oi!

 

DOCTOR: Ha! Matchstick man.

Then the 10th suddenly looks at him like he recognizes him, then they say this:

DOCTOR 10: You're not. (They both get out their sonic screwdrivers. 11's is bigger and better.)

 

DOCTOR 10: Compensating.

 

DOCTOR: For what?

 

DOCTOR 10: Regeneration. It's a lottery.

 

DOCTOR: Oh, he's cool. Isn't he cool? I'm the Doctor and I'm all cool. Oops, I'm wearing sandshoes.

Which made me think: how did the 10th Doctor recognize the 11th as his future self? He didn’t regenerate into him yet, so how did he know he is his future self?

In the 50th anniversary episode when the 10th Doctor saw a time rip, a person came out of it then this conversation happens:

ELIZABETH: Who is this man?

DOCTOR 10: That's just what I was wondering.

DOCTOR: Oh, that is skinny. That is proper skinny. I've never seen it from the outside. It's like a special effect. Oi!

DOCTOR: Ha! Matchstick man.

Then the 10th suddenly looks at him like he recognizes him, then they say this:

DOCTOR 10: You're not. (They both get out their sonic screwdrivers. 11's is bigger and better.)

DOCTOR 10: Compensating.

DOCTOR: For what?

DOCTOR 10: Regeneration. It's a lottery.

DOCTOR: Oh, he's cool. Isn't he cool? I'm the Doctor and I'm all cool. Oops, I'm wearing sandshoes.

Which made me think: how did the 10th Doctor recognize the 11th as his future self? He didn’t regenerate into him yet, so how did he know he is his future self?

in the 50th when the 10th doctor saw a time rip a person came out of it then this conversation happens

ELIZABETH: Who is this man?

DOCTOR 10: That's just what I was wondering.

DOCTOR: Oh, that is skinny. That is proper skinny. I've never seen it from the outside. It's like a special effect. Oi!

DOCTOR: Ha! Matchstick man.

then the 10th suddenly looks at him like he recognizes him then they say this

DOCTOR 10: You're not.  (They both get out their sonic screwdrivers. 11's is bigger and better.)

DOCTOR 10: Compensating.

DOCTOR: For what?

DOCTOR 10: Regeneration. It's a lottery.

DOCTOR: Oh, he's cool. Isn't he cool? I'm the Doctor and I'm all cool. Oops, I'm wearing sandshoes.

which made me think how did the 10th doctor recognizes the 11th as his future self? he dint regenerate into him yet so how did he know he is his future self

In the 50th anniversary episode when the 10th Doctor saw a time rip, a person came out of it then this conversation happens:

ELIZABETH: Who is this man?

DOCTOR 10: That's just what I was wondering.

DOCTOR: Oh, that is skinny. That is proper skinny. I've never seen it from the outside. It's like a special effect. Oi!

DOCTOR: Ha! Matchstick man.

Then the 10th suddenly looks at him like he recognizes him, then they say this:

DOCTOR 10: You're not.  (They both get out their sonic screwdrivers. 11's is bigger and better.)

DOCTOR 10: Compensating.

DOCTOR: For what?

DOCTOR 10: Regeneration. It's a lottery.

DOCTOR: Oh, he's cool. Isn't he cool? I'm the Doctor and I'm all cool. Oops, I'm wearing sandshoes.

Which made me think: how did the 10th Doctor recognize the 11th as his future self? He didn’t regenerate into him yet, so how did he know he is his future self?