Actually even if you do rm -f, the -i will still be added if it is an alias. Better is to use the bash builtin "type":

type rm is better than which rm, but it depends on what distro you're using. Some distros (Just checked on RHEL7) will fancify which as well ie:

$ type which which is aliased to `alias | /usr/bin/which --tty-only --read-alias --show-dot --show-tilde'

> Actually even if you do rm -f, the -i will still be added if it is an alias.

Yes, I know, but rm ignores -i if -f is given.

  [root@example ~]# touch blah
  [root@example ~]# rm -i -f blah
  [root@example ~]# 

And hence:

  [root@example ~]# which rm
  alias rm='rm -i'
  	/usr/bin/rm
  [root@example ~]# touch blah
  [root@example ~]# rm -f blah
  [root@example ~]#

@type: yes, you're right, thanks for the reminder.