Use of ! (or any logical operator) with %>% (magrittr) produces unexpected output

Question

I have run across a situation where %>% produces very surprising output when combined with !. Consider the following code:

x <         


        

Answer 1

I suspect that it's an order of operations issue:

!is.na(x) %>% sum

is evaluating to

!(is.na(x) %>% sum)

Which is equivalent to TRUE