m <- NA
n <- TRUE
if (n || m) print("output: TRUE") else print ("output: FALSE")
# [1] "output: TRUE"

n <- NA
m <- TRUE
if (n || m) print("output: TRUE") else print ("output: FALSE")
# [1] "output: TRUE"


n <- NA
m <- FALSE
if (n || m) print("output: TRUE") else print ("output: FALSE")
# ERROR!!