I had a "software engineer" work for me that didn't know if from while. Literally. He was copy pasting stuff until it "worked". One day he calls me over because his program is hanging. He had something like " while (x) print something; ". I asked how that would work if x never changes in the loop. After I bit of blankness, I said " isn't this just supposed to print once, like maybe use an if? "

"Oh yeah, if. That's the one I wanted."

...

Worked with another person of similar skill, that went on to become Microsoft MVP. Do not underestimate how far drag-n-drop and copy paste can take someone with modern timing. Especially if they're good/inclined to tout themselves.