It's funny, because I don't really consider making statements about what I plan to do in the future lies.

Like, if I promise someone I'll do something for them or do something important to them and I know I won't, that's a lie.

But if I'm just sharing a plan or a personal need... I don't see that as a lie. My plans and needs change by minute. I can decide to discuss something with my spouse, then change my mind. To me, it falls under the category of personal autonomy. Frankly it's not even a company's business why I need more time, and if they want a reason to give it to me, and I give them a reason about needing to discuss it, I'm free to change my mind immediately afterwards without telling them. And that being the case, it makes no difference what my reason for needing time actually was.

Also, remember that they're the ones telling you they have a 48h deadline in the first place. Isn't that a lie, too? But you're not going to judge them for extending that for you, because it's in your interest. Same way they won't judge you for your reason for needing more time, because they want to hire you.

I don't know. I just think it's hard to call these things lies when they're merely stating intent, which is constantly changing. But I appreciate your perspective! It comes from a different moral worldview, which is important to recognize.