Processed Romaine Lettuce.
Andy Boy sells a packeaged product, which experience has shown is very very clean.
There are reasons for that – the way it is grown and processed eliminates bugs (by and large) everyone once in a great big while they do have bugs.
Question: Assuming one look at Romaine Lettuce as Muchzak Ngoim would a particular brand such as Andy Boy looked at differently.
Yet, each type of lettuce would be looked at according to its method of processing, and by experience. If you use a particular brand, and consistently find it clean (in spite of thorough checking), then it would not be muchzak as nagua.
The question of classifying foods for the purpose of checking depends on the practical metzius of whether bugs are commonly found or not.