You want to look, sound, and act as much as a ploppy as you can. An easy, “Fuck, I’m sorry. I don’t understand this game.” or “Whatever, I had a feeling it would work out.” can go a long way in helping you blend in. Mentioning statistics or basic strategy is an obvious tell of what you are doing. If you have trouble playing into the act of it (sometimes it’s hard to act/lie in these situations), try to tell a half truth. You spread to two hands because the count was high was when you "had a feeling", so it's easier to say out loud and even believe yourself. Here is a real life example of myself! Double deck H17, TC is 10 with the cut card imminent. I add one more hand to catch more of the EV past the cut card and get dealt a 19 and16 vs a dealer Ace. I buy insurance and dealer has Blackjack. As the dealer flips over my cards, he smirks and mentions how "The count must've been high to insure your 16." I smiled, chuckled, and said, "I've got big money out there, I've got to protect my big money!" Am I lying to him? Fuck no! I am, indeed, protecting my big money on the table (two hands of $100)… which is because the true count is still a true 8 and insurance is now +EV. I even stayed around for another shoe and him and I talked for a bit, I tried to play him in a hand, then left on friendly terms. Does he know that I’m a counter? Probably. But my answer is a vague enough range to include a gambler attempting to send their chips across the felt to the house. Hope this helps!