Can someone help break down this sentence? 僕が同一人物だと確信に踏み切れないのはこの子の顔が半分しか見えていないからだ


[![enter image description
here](https://i.stack.imgur.com/ZTVoZ.png)](https://i.stack.imgur.com/ZTVoZ.png)

I don't really understand this sentence. Could someone help break it down for
me?

> 僕が同一人物だと確信に踏み切れないのはこの子の顔が半分しか見えていないからだ。

From the way I interpreted it, it would have a meaning similar to:

> The reason I can't boldly believe she is the same person is because I can't
> see more than half of her face.

which I do not think is correct.




I'm an 82-year-old Japanese male.

I will translate the quoted part as:

> The reason I'm not confident of her being the same girl is that I can see
> only half (portion) of her face.




I'm an 82-year-old Japanese male.

I will translate the quoted part as:

> The reason I'm not confident of her being the same girl is that I can see
> only half (portion) of her face.

