[RoosterRedux]

Yep. If those aliens fly solid space ships with no protective shields and if those aliens are physical--biological or mechanical--beings that can be killed or stopped, we will defend the world from them.

But on the other hand, if they can walk through walls, evaporate into thin air as if they were never here, invade our minds and make us do things we don't want to do, take our sperm and eggs and create hybrids that look like us but aren't, if they can take our generals in the middle of the night from their beds...well, we might have to rethink our defensive strategy.

[Lazamataz]

All any extraterrestrial would need to do to win, is throw rocks at us.

Really big rocks.

[RoosterRedux]

As recently deceased Freeper Quix used to say, if what we think are aliens are actually something more akin to Biblical demons (and many people, even some generals in the Pentagon, think this is accurate)...our only defense against them would be God.

Just food for thought, mind you.;-)

[Theophilous Meatyard III]

Then, they may already be here.

[Jonty30]

I don’t our best possible weapons can put a dent in a ship that can withstand micrometeorites at the speed of light.

I think Independence Day did a decent job at showing our futility on that point.

I also think this is really about softening us further of the deception that is to come.

[bert]

Since we are still unable to develop two way communications with colonial insects including honey bees, ants and termites, I doubt we will be able to communicate with alien species.