### Question:
ConjunctionImpl implements Conjunction<T> { @Override public int hashCode() { return this.literals.hashCode(); } ConjunctionImpl(List<? extends T> literals); @Override List<T> getLiterals(); @Override Stream<Term> getTerms(); @Override int hashCode(); @Override boolean equals(Object obj); @Override Iterator<T> iterator(); @Override String toString();  }### Answer:
@Test public void testEqualsLiterals() { final Variable x = Expressions.makeUniversalVariable("X"); final Constant c = Expressions.makeAbstractConstant("c"); final PositiveLiteral positiveLiteral1 = Expressions.makePositiveLiteral("p", x, c); final NegativeLiteral negativeLiteral1 = Expressions.makeNegativeLiteral("p", x, c); final ConjunctionImpl<Literal> conjunction1 = new ConjunctionImpl<>( Arrays.asList(positiveLiteral1, negativeLiteral1)); final Literal positiveLiteral2 = Expressions.makePositiveLiteral("p", x, c); final Literal negativeLiteral2 = Expressions.makeNegativeLiteral("p", x, c); final ConjunctionImpl<Literal> conjunction2 = new ConjunctionImpl<>( Arrays.asList(positiveLiteral2, negativeLiteral2)); assertEquals(conjunction1, conjunction1); assertEquals(conjunction2, conjunction1); assertEquals(conjunction2.hashCode(), conjunction1.hashCode()); }