What kind of reasoning is this? Even if the government had not lied about medicine, or any other topic before, there is equally "no reason" that they couldn't l

What kind of reasoning is this? Even if the government had not lied about medicine, or any other topic before, there is equally "no reason" that they couldn't lie going forward about anything and everything. Everyone and anyone could lie to you at any given moment. What's your point? How do you go on living your life?