Wouldn't or Would?

[Mahi93]

Hi everyone,

I read this and now I'm a bit confused.

"Close the hatch behind us and be ready to open that hatch at a moment’s notice if we come running.”
“You think there may be some surprises left for us?”
“I wouldn’t doubt it, but you never know. I’m probably just being overly cautious."

Considering that he adds "but you never know" to his answer.
Shouldn't the answer have been: “I would doubt it, but you never know. I’m probably just being overly cautious."?

Can someone help me out here please?

[Raymott]

Yes, that makes more sense to me too.

[Mahi93]

Yes, that makes more sense to me too.

Thanks for the affirmation Raymott