Guava multiple interface and generics, got error "The method XXX in the type XXX is not applicable for the arguments"

Question

Predicate and() method is defined like this :

 com.google.common.base.Predicates.and(Predicate<? super T>, Predicate<? super T>)

I have three interfaces with the third extending others :

public interface IFolderable {
    String getFolder();
}

public interface IId {
    int getId();
}

public interface IBoth extends IFolderable, IId {}

And an object implementing the third:

public class MyClass implements IBoth {
     String getFolder() {
          return "myFolder";
     }
     int getId() {
          return 1;
     }
}

I want to do something like this :

    List<MyClass> list = Lists.newArrayList();
    Collections2.filter(list, Predicates.and(new Predicate<IFolderable>() {
         // core predicate using getFolder();
    }, new Predicate<IId>() {
         // core predicate using getId();
    }));

But this code generate this error at compile time :

The method and(Predicate<? super T>, Predicate<? super T>) in the type Predicates is not applicable for the arguments (new Predicate<IFolderable>(){}, new Predicate<IId>(){})

How can I mix two predicates specialized on one interface over the and() guava method, in order to filter a list of MyClass ?

More generally, how can I specialized generic method in that way ?

I don't want to declare Predicate with IBoth generic type, because I have other object implementing just IFolderable or IId. (I don't want to have a new Predicate<IBoth>)