Why is this returning true? Party Bounce and Slide 13 x18 is not in the if statements?

```
print_r($btypes);
        //Array ( [0] => 11x13 Red and Yellow 2 [1] => Party Bounce and Slide 13 x 18 )

        if(in_array("12x15 Purple and Yellow 2" || "11x13 Red and Yellow 1" || "12x15 Yellow and Purple old" || "11x13 Red and Yellow 2" || "12x15 Purple and Yellow 1" ,$btypes) && 
        in_array("Bootcamp Obstacle Course" ||  "Terminator Torment Obstacle Course" || "Lizard Obstacle Course" || "Bugs Obstacle Course" || "Nemo Obstacle Course",$btypes))
        {
            return "Standard Bouncy Castle and an Obstacle Course";
        }

```

Thanks for your help