Rscript不加载方法包，R确实 - 为什么，后果是什么？

Just saw this:

刚看到这个：

$ Rscript -e "sessionInfo()['basePkgs']"
$basePkgs
[1] "stats"     "graphics"  "grDevices" "utils"     "datasets"  "base"

$ R --vanilla --slave -e "sessionInfo()['basePkgs']"
$basePkgs
[1] "stats"     "graphics"  "grDevices" "utils"     "datasets"  "methods"
[7] "base"
$ Rscript -e "session