Haas's rival Leopold Nowak was appointed to produce a whole new critical edition of Bruckner's works. He and others such as Benjamin Korstvedt and conductor Leon Botstein argued that Haas's explanation is at best idle speculation, at worst a shady justification of Haas's own editorial decisions. Also, it has been pointed out that Bruckner often started work on a symphony just days after finishing the one before. As Cooke writes, "In spite of continued opposition and criticism, and many well-meaning exhortations to caution from his friends, he looked neither to right nor left, but simply got down to work on the next symphony." The matter of Bruckner's authentic texts and the reasons for his changes to them remains politicised and uncomfortable.