Contrast: unlike "it is confirmed that," it leaves room for the speaker being wrong
Register: neutral, common in spoken debugging sessions and written code review comments
0 / 10 completed
1 / 10
A bug triage comment reads: "___ , this only reproduces on Safari, though I haven't tested every version." Which phrase best signals a conclusion limited by the speaker's own investigation?
As far as I can tell is a fixed idiom meaning "based on what I know or have checked." It requires "as" before "I can tell." "As far I can tell" drops the required "as," "as far as I can telling" wrongly uses a gerund, and "as far as I could tell it" adds an unnecessary object.
2 / 10
Which sentence uses "as far as I can tell" correctly?
"As far as I can tell, the memory leak is confined to the worker process, but I haven't profiled the main thread yet" correctly limits a technical claim to the scope of what the speaker has actually investigated. It cannot introduce a confident future plan, an instruction, or a scheduled event.
3 / 10
Fill the blank: "___ , the two services never call each other directly — all communication goes through the message queue."
As far as I can tell has a fixed word order: "as" + "far" + "as" + "I" + "can" + "tell." The other options scramble this into invalid, meaningless sequences.
4 / 10
Which pair correctly distinguishes "as far as I can tell" from "it is confirmed that"?
"As far as I can tell, the fix resolved the race condition" leaves room for the speaker being wrong or having missed something. "It is confirmed that the fix resolved the race condition" claims a verified, checked fact.
5 / 10
A code review comment reads: "___ , this function is only called from the admin panel, so the extra validation may be unnecessary." Which best completes the sentence?
As far as I can tell is the correct, fixed form. The other options scramble the required word order into invalid phrases.
6 / 10
Which sentence contains an error in the use of "as far as I can tell"?
"As far as I can tell that the linter reported yesterday, three files have unused imports" incorrectly attaches a relative clause to the fixed idiom, which cannot be modified this way. The other three sentences use it correctly as a standalone epistemic hedge.
7 / 10
Choose the sentence where "as far as I can tell" is best replaced by "from what I can see" without changing the meaning.
"From what I can see, none of the failing tests are related to my change" preserves the meaning exactly. The other options misuse the phrase as an urgency marker, an unrelated construction, or a pairing with a specific future date.
8 / 10
A design doc states: "___ , no other service depends on this internal API, so removing it should be safe." Which best fits?
As far as I can tell is the correct, standard form — the modal "can" and bare infinitive "tell" are fixed. Option A wrongly uses a gerund. Option B wrongly conjugates "tell" with an "-s." Option D scrambles the word order.
9 / 10
Which register note about "as far as I can tell" is accurate?
"As far as I can tell" works equally well in a spoken debugging session ("As far as I can tell, it's a timing issue") and a written code review comment. It always limits a claim to what the speaker has actually checked.
10 / 10
Which sentence best demonstrates "as far as I can tell" limiting a technical claim to the scope of the speaker's own investigation?
"As far as I can tell, the corrupted records all came from the batch import job... though I haven't ruled out the API path entirely" is the textbook use: a bounded claim with an explicit acknowledgment of the limits of the investigation. The other options misuse the phrase as a command intensifier, insert it awkwardly mid-clause, or pair it incorrectly with a future date.
What will I practise in ""As Far As I Can Tell" as an Epistemic-Limit Hedge — IT English Grammar"?
Practice using "as far as I can tell" to limit a technical claim to the scope of your own investigation, in debugging and code review.
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