(I) can't say that I do

(I) can't say that I do

I do not. They asked me if I know how to create a spreadsheet like that, but I can't say that I do—it doesn't look familiar to me.
See also: say, that
Farlex Dictionary of Idioms.

(I) can't say that I do.

 and (I) can't say's I do.; (I) can't say (as) I do.
Fig. a vague response to a question about whether one remembers, knows about, likes, etc., something or someone. (The say as and say's are not standard English.) Jane: You remember Fred, don't you? John: Can't say as I do. Bob: This is a fine looking car. Do you like it? Bill: I can't say I do.
See also: say, that
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • can't say that I do
  • say
  • speak from the/(one's) heart
  • a fly will not get into a closed mouth
  • go further
  • a closed mouth gathers no feet
  • (I) can't say as I do(, can't say as I don't)
  • (one's) say
  • one's say
  • before you can say knife