If you look at a neutron as consisting of a proton, an electron and an electron anti-neutrino it becomes easier to see how it's annihilated by an anti-neutron, as that consists of a positron, an anti-proton and an electron neutrino, each of with annihilates their counterpart. (note, simplified explanation)
Reductionist and proud of it.
Being ignorant is not so much a shame, as being unwilling to learn. Benjamin Franklin
Chase after the truth like all hell and you'll free yourself, even though you never touch its coat tails. Clarence Darrow
A person who won't read has no advantage over one who can't read. Mark Twain