That an infant can stay seated quietly for two hours.
My daughter was 2 when I first started going to meetings. So, she didn't even have the benefit of being trained "from infancy". I wasn't a heavy disciplinarian, so when she got fidgety, I would just take her out of the room. I would even take her outside on warm days. I would be frustrated to tears sometimes, and take nothing in at the meeting, having spent the entire time trying to keep a normal toddler subdued.
I didn't give it all much thought until a sister mentioned something she thought would help me keep my child from distrupting the meeting. DISRUPTING? That really stung. Here, I had a reputation. I even asked, "you think she is disruptive????" That sister nodded. The struggle continued. It was hard enough without the judgement, and now the knowledge, that everyone was watching. It wasn't like she was yelling out. She would get antsy, I'd take her out of the main room. Whatever. I certainly was not going to beat her. F them. It's over now. And my daughter was not disruptive. She was well behaved, and she never embarrassed me in public. Unfortunately, to them, she was normal and not a little zombie. I didn't have the heart to "break" her. She's 23 now, and I still like her. Disruptive--bullsh*t.