What is the difference between 「本物」 and 「本当」?


Originally, I had the following sentence:

> 人形は **本当** の人のように動きました。

A Japanese native corrected to be:

> 人形は **本物** の人のように動きました。

I just want to understand what the difference between the 2 words is, and why
本物 is more appropriate in this sentence.




**本当**

  * is an adjective itself (some people call it _no-adjective_ ; 本当だ "be true", 本当に "really")
  * _true_ as opposed to _wrong_ , _apparent_ , _untrue_ , _lying_
  * _proper_ as opposed to _impure_ , _inaccurate_ , _questionable_
  * _real_ as opposed to _fictitious_ , _imaginary_

**本物**

  * is a noun itself (本物だ "be a/the true thing", 本物に "to a/the true thing")
  * _a genuine thing_ as opposed to _a fake, pretended one_
  * _a full-fledged thing_ as opposed to _a substandard one_

In this context, the doll (or puppet?) is an imitation of real human, so 本物 is
felt somewhat more suitable, but it doesn't mean 本当 is invalid or unacceptable
here. Besides, the most ideal wording I think would be:

> 人形は本物の人間のように動きました。




**本当**

  * is an adjective itself (some people call it _no-adjective_ ; 本当だ "be true", 本当に "really")
  * _true_ as opposed to _wrong_ , _apparent_ , _untrue_ , _lying_
  * _proper_ as opposed to _impure_ , _inaccurate_ , _questionable_
  * _real_ as opposed to _fictitious_ , _imaginary_

**本物**

  * is a noun itself (本物だ "be a/the true thing", 本物に "to a/the true thing")
  * _a genuine thing_ as opposed to _a fake, pretended one_
  * _a full-fledged thing_ as opposed to _a substandard one_

In this context, the doll (or puppet?) is an imitation of real human, so 本物 is
felt somewhat more suitable, but it doesn't mean 本当 is invalid or unacceptable
here. Besides, the most ideal wording I think would be:

> 人形は本物の人間のように動きました。

