Generating a logical vector (2)

flights |> 
  mutate(daytime = dep_time > 600, .keep = "used")

## # A tibble: 336,776 × 2
##    dep_time daytime
##       <int> <lgl>  
##  1      517 FALSE  
##  2      533 FALSE  
##  3      542 FALSE  
##  4      544 FALSE  
##  5      554 FALSE  
##  6      554 FALSE  
##  7      555 FALSE  
##  8      557 FALSE  
##  9      557 FALSE  
## 10      558 FALSE  
## # ℹ 336,766 more rows