You mention one statement from the Press Secretary ascribe to it malice. Do you know she lied rather than was misinformed? Assume she is lying. Does this mean the whole administration lied? The discussion at hand is about Yellen (and by extension economists at NBER and other agencies). One statement by the Press Secretary is evidence of a lie by these people? I don’t think so.
It’s believable that Yellen and Biden and Pskai did lie because in politics you try to sway public perception and opinion. I don’t believe NBER has lied and to blame inflation on fiscal stimulus that largely occurred two years ago seems outright bad thinking. Especially to then blame the current administration for it. Inflation is going on all over the world. It’s not Biden’s fault. There’s a collection of reasons and mechanisms at play and Biden can only do so much.