Whenever you have time, it will be fine.
Oh, yes, the good old Matrix concept. But, you see, it is again not relevant. We can only gain knowledge about the external reality through our senses. By definition, whatever our senses report to us, IS the actual reality. To assume otherwise does not lead anywhere.
This whole “doubt” of sensory (name removed by moderator)ut comes from a simple problem. We can incorrectly interpret the reporting of our eyes. Mind you, our eyes report the reality correctly, but under certain circumstances we can interpret the “raw data” improperly (mirage). Our other senses are usually “fine” - unless one is under the influence of some serious drug. No one mistakes the smell or a rose and believe that he just smelled a rotting carcass. Or hear a quiet whisper and think that it was a thunder. Or mistake a beating for a caress.
The solution is simple again. If in doubt about the interpretation of our senses, apply more of it. If you have doubt about the “lake” in the distance, get closer to it, immerse in it, drink some of it. To say: “well I see this lake, I swim in it, I can taste it, I can hear the water slapping - but maybe I am mistaken, and I may really be in a desert, about to die from dehydration” - is nonsense. To deny the reports of our senses effectively says: “we cannot see
because we eyes (and our eyes may distort ‘reality’) and we cannot hear
because we have ears (and our ears may distort ‘reality’), etc…”.
The question of “but what is the
true nature of reality?” can only be asked by a philosopher (I am using my most denigrating tone when saying that word).
Why do you think so? We are all aware of our own mind’s existence. There is one thing we are unable to accept: that we are
insane. Not even the clinically insane believes that he or she is insane. As such, whatever I percieve as reality, I accept as reality - because there is no other way. In order to deny our senses we must affirm them. Just like the law of non-contradiction. There is no way to deny that, because to deny it one must accept it.

By sheer logic, we must accept that our senses are fine - and before someone tries to say “we accept them on
faith” - no we do not. By the way, we are not limited to our actual 5 senses, we are able to extend them via artifical means. Our eyes cannot “see” the X-rays, or the radio waves - directly - but we can create instruments to extend our capabilities. I hope this explains the materialist / empiricist view.