Generating Label Cohesive and Well-Formed Adversarial Claims

Adversarial attacks reveal important vulnerabilities and flaws of trained models. One potent type of attack are universal adversarial triggers, which are individual n-grams that, when appended to instances of a class under attack, can trick a model into predicting a target class. However, for inference tasks such as fact checking, these triggers often inadvertently invert the meaning of instances they are inserted in. In addition, such attacks produce semantically nonsensical inputs, as they simply concatenate triggers to existing samples. Here, we investigate how to generate adversarial attacks against fact checking systems that preserve the ground truth meaning and are semantically valid. We extend the HotFlip attack algorithm used for universal trigger generation by jointly minimizing the target class loss of a fact checking model and the entailment class loss of an auxiliary natural language inference model. We then train a conditional language model to generate semantically valid statements, which include the found universal triggers. We find that the generated attacks maintain the directionality and semantic validity of the claim better than previous work. * denotes equal contribution Dissociative disorders have been attributed to disruptions in memory caused by trauma or other forms of stress. SUPPORTS REFUTES Dissociative identity disorder, or DID, may be the result of memory disruptions that have been induced by psychological trauma. CLAIM don,already,more,during,home GPT-2 Claim Generation Dissociative disorders have been attributed to disrupted brain activity during trauma or other forms of stress.