premise: How to remove ink stains from polyester<br>Blot the ink away. If you catch a stain when it happens, you may be able to simply blot it out. This can help remove the stain before it becomes too much of a problem.
hypothesis: Ink stains can't be fully removed.
reason: No where does it state in the text that ink stains can be fully removed. I think the machine got it wrong because it doesn't realize that there are varying degrees of taking care of a stain.