groupthink

so i was having a lovely buffet with my family today and there was laksa. i don't eat laksa cos its too hot for me (low tolerance of spicy food). since it was a buffet, obviously you have to at least try one of every dish they're serving to break even, so my aunt and cousin took the laksa at the same time. my aunt ate it and said it was yummy, better than average. my cousin ate it and didn't nod in agreement, instead he said good laksa was wasted on him as he couldn't really tell the difference. but in the end as a joke he said it was nice too. "wonderful" even. then when i got back and started revising group communication, i wondered if this counted as groupthink, illusion of unanimity? Illusion of unanimity is when a member in doubt believes that everyone else agrees with the group's chosen decision/conclusion/action. Well this happened within family so i don't think its the perfect example for this but i guess you could somehow relate it to the actual meaning.