The sources you mentioned are not authentic. Laszlo is not active in this forum anymore. So, it's not possible to get an answer from him. But he was interviewed many times. He never said he traded 40000 Bitcoins for eight pizzas. Don't conclude just from some fake resources. Most Twitter accounts are trying to say something new and get some attention to increase their followers. I won't believe any of them without a proper source. If they can refer to the post where Laszlo himself said that he bought eight pizzas and traded 40000 Bitcoins, I will believe that. Moreover, I will look for the Blockchain transaction as well.

Don't trust anyone. Verify!
Whenever you see someone saying something without a source, Ask them to provide a reference from where they get it. He was active in the forum till 2017. Don't you think he would share that if he had done those deals too?