From Juliet Stanton
Donca Steriade and I are curious about some aspects of flapping in English. To respond, you can either comment on this post or email me directly at juliets [at] mit [dot] edu. Please also indicate whether or not you are a native speaker of English, and if so, what your native dialect is.
1. Do you flap in words like sanity, societal, parietal, skeletal, palatal?
2. Do you flap in words like normative, ablative, associative, additive?
3. Do you flap in words like completive, locomotive, emotive?
(We welcome any additional comments you might have on the structure of these words.)