It’s also easy — if you want to be like this, you just can.
I think you can easily choose to follow a policy of never saying things you know to be false. (Easy in the sense of “considering only the internal costs of determining and executing the action consistent with this policy, ignoring the external costs, e.g. losing your job and friends.) But I’m not sure it’s easy to do the extra thing of “And you would never try to forget or [confuse yourself about] a fact with the intention to make yourself able to assert some falsehood in the future without technically lying, etc”
I think you can easily choose to follow a policy of never saying things you know to be false. (Easy in the sense of “considering only the internal costs of determining and executing the action consistent with this policy, ignoring the external costs, e.g. losing your job and friends.) But I’m not sure it’s easy to do the extra thing of “And you would never try to forget or [confuse yourself about] a fact with the intention to make yourself able to assert some falsehood in the future without technically lying, etc”