The last time we covered Donald Trump’s ongoing feud with a child, he was ranting about the fact that Time magazine had named Swedish activist Greta Thunberg its person of the year.

“So ridiculous,” he fumed last month on Twitter. “Greta must work on her Anger Management problem, then go to a good old fashioned movie with a friend! Chill Greta, Chill!”

Trump’s campaign even went so far as to photoshop Trump’s face on Greta’s body for the TIME cover, because our president is a giant baby.

Get a load of this crap:

When it comes to keeping his promises, there's only one Person Of The Year:

✅Booming Economy
✅Record Job Creation
✅Historic Tax Cuts
✅#AmericaFirst Trade Deals
✅ISIS Destroyed
✅Building the Wall#TIMEPOY #PromisesMadePromisesKept pic.twitter.com/pe1CNB7KKz

— Trump War Room — Text FIGHT to 88022 (@TrumpWarRoom) December 11, 2019

Previously, he’d taken to his account to ridicule Thunberg for chiding world leaders on their inaction on climate change, mocking her impassioned speech about “mass extinction” and “empty words” by tweeting, “She seems like a very happy young girl looking forward to a bright and wonderful future. So nice to see!”

After his last attack on the minor 57 years his junior—which first lady and anti-bullying crusader Melania Trump suggested was deserved—we assumed the president would move on to other matters, like running the country, lying about imminent attacks on Americans, and mounting his extremely flimsy defense against impeachment. In retrospect, though, that was a ridiculous assumption re: his priorities, which of course include continuing to publicly ridicule a child.

In a prepared speech at the World Economic Forum in Davos (that he delivered terribly), Trump took the opportunity to take a swipe at Thunberg—who was in the audience—deriding “perennial prophets of doom and their predictions of the apocalypse” about the environment.

“They are the errors of yesterday’s fortune-tellers,” Trump claimed, “and we have them and I have them and they want to see us do badly, but we don’t let that happen,” adding that in order to “embrace the possibilities of tomorrow,” we must reject the warnings of such individuals.

So now Trump has attacked Thunberg twice on Twitter and once in a speech, so the liar-in-chief speaks to the Wall Street Journal and they reported:

President Trump said on Tuesday said he didn’t know anything about Swedish climate activist Greta Thunberg but called her “very angry” in an interview with the Wall Street Journal. “I don’t really know anything about her,” Trump said of Thunberg when asked about her on the sidelines of the World Economic Forum in Davos, Switzerland.

Claiming not to know someone despite reams of documented evidence to the contrary is, of course, the president’s thing.

Earlier this month, he claimed not to know Lev Parnas, a man he allegedly tasked with working on the scheme to pressure Ukraine into digging up dirt on Joe Biden, according to CNN, and with whom he’s been photographed on numerous occasions.

Previously, he’s also denied knowing E.U. Ambassador Gordon Sondland, Prince Andrew and a host of others.